| sine | (noun) ratio of the length of the side opposite the given angle to the length of the hypotenuse of a right-angled triangle | Synonyms: sin |
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| sinecure | (noun) an office that involves minimal duties | - |
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| (noun) a benefice to which no spiritual or pastoral duties are attached | - |
| sinew | (noun) possessing muscular strength | Synonyms: brawn, brawniness, heftiness, muscle, muscularity |
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| (noun) a cord or band of inelastic tissue connecting a muscle with its bony attachment | Synonyms: tendon |
| sinewy | (adjective) consisting of tendons or resembling a tendon | Synonyms: tendinous |
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| (adjective) (of a person) possessing physical strength and weight; rugged and powerful | Synonyms: brawny, hefty, muscular, powerful |
| (adjective) (of meat) full of sinews; especially impossible to chew | Synonyms: fibrous, stringy, unchewable |
| sinful | (adjective) far more than usual or expected | Synonyms: extraordinary, over-the-top |
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| (adjective) having committed unrighteous acts | Synonyms: unholy, wicked |
| (adjective) characterized by iniquity; wicked because it is believed to be a sin | Synonyms: iniquitous, ungodly |
| sinfulness | (noun) estrangement from god | Synonyms: sin, wickedness |
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| sing | (verb) make a whining, ringing, or whistling sound | Synonyms: whistle |
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| (verb) divulge confidential information or secrets | Synonyms: babble, babble out, blab, blab out, let the cat out of the bag, peach, spill the beans, talk, tattle |
| (verb) to make melodious sounds | - |
| (verb) produce tones with the voice | - |
| (verb) deliver by singing | - |
| singable | (adjective) suitable for singing | - |
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| singalong | (noun) informal group singing of popular songs | Synonyms: singsong |
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| singe | (noun) a surface burn | Synonyms: scorch |
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| (verb) burn superficially or lightly | Synonyms: swinge |
| (verb) become superficially burned | Synonyms: scorch, sear |
| singer | (noun) a person who sings | Synonyms: vocaliser, vocalist, vocalizer |
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| singing | (adjective) smooth and flowing | Synonyms: cantabile |
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| (noun) the act of singing vocal music | Synonyms: vocalizing |
| (noun) disclosing information or giving evidence about another | Synonyms: tattle, telling |
| single | (adjective) being or characteristic of a single thing or person | Synonyms: individual |
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| (adjective) not married or related to the unmarried state | Synonyms: unmarried |
| (adjective) used of flowers having usually only one row or whorl of petals | - |
| (adjective) existing alone or consisting of one entity or part or aspect or individual | - |
| (adjective) not divided among or brought to bear on more than one object or objective | Synonyms: exclusive, undivided |
| (adjective) having uniform application | - |
| (adjective) characteristic of or meant for a single person or thing | Synonyms: individual |
| (noun) a base hit on which the batter stops safely at first base | Synonyms: bingle |
| (noun) the smallest whole number or a numeral representing this number | Synonyms: 1, ace, I, one, unity |
| (verb) hit a single | - |
| singleness | (noun) the quality of concentrating on one central objective | - |
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| (noun) without hypocrisy | Synonyms: straightforwardness |
| singles | (noun) tennis played with one person on each side | - |
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| (noun) badminton played with one person on each side | - |
| singlestick | (noun) a stick used instead of a sword for fencing | Synonyms: backsword, fencing stick |
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| singlet | (noun) a collarless men's undergarment for the upper part of the body | Synonyms: undershirt, vest |
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| singleton | (noun) the playing card that is the only card in a suit held in a bridge hand as initially dealt | - |
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| (noun) a set containing a single member | - |
| (noun) a single object (as distinguished from a pair) | - |
| singly | (adverb) one by one; one at a time | - |
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| (adverb) apart from others | Synonyms: individually, on an individual basis, one by one, separately, severally |
| singsong | (adjective) uttered in a monotonous cadence or rhythm as in chanting | Synonyms: chantlike, intoned |
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| (noun) informal group singing of popular songs | Synonyms: singalong |
| (noun) a regular and monotonous rising and falling intonation | - |
| (verb) speak, chant, or declaim in a singsong | - |
| (verb) move as if accompanied by a singsong | - |
| singular | (adjective) grammatical number category referring to a single item or unit | - |
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| (adjective) composed of one member, set, or kind | - |
| (adjective) unusual or striking | Synonyms: remarkable |
| (adjective) being a single and separate person or thing | - |
| (adjective) the single one of its kind | Synonyms: unique |
| (adjective) beyond or deviating from the usual or expected | Synonyms: curious, funny, odd, peculiar, queer, rum, rummy |
| (noun) the form of a word that is used to denote a singleton | Synonyms: singular form |
| singularise | (verb) distinguish as singular | Synonyms: singularize |
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| singularity | (noun) the quality of being one of a kind | Synonyms: uniqueness |
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| (noun) strangeness by virtue of being remarkable or unusual | - |
| singularize | (verb) distinguish as singular | Synonyms: singularise |
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| singularly | (adverb) in a singular manner or to a singular degree | - |
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| singultus | (noun) (usually plural) the state of having reflex spasms of the diaphragm accompanied by a rapid closure of the glottis producing an audible sound; sometimes a symptom of indigestion | Synonyms: hiccough, hiccup |
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| sinister | (adjective) threatening or foreshadowing evil or tragic developments | Synonyms: baleful, forbidding, menacing, minacious, minatory, ominous, threatening |
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| (adjective) stemming from evil characteristics or forces; wicked or dishonorable | Synonyms: black, dark |
| (adjective) on or starting from the wearer's left | - |
| sinistral | (adjective) of or on the left | - |
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| (adjective) preferring to use left foot or hand or eye | - |
| sinistrality | (noun) preference for using the left hand | Synonyms: left-handedness |
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| sinistrorsal | (adjective) spiraling upward from right to left | Synonyms: sinistrorse |
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| sinistrorse | (adjective) spiraling upward from right to left | Synonyms: sinistrorsal |
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| sink | (noun) plumbing fixture consisting of a water basin fixed to a wall or floor and having a drainpipe | - |
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| (noun) a covered cistern; waste water and sewage flow into it | Synonyms: cesspit, cesspool, sump |
| (noun) a depression in the ground communicating with a subterranean passage (especially in limestone) and formed by solution or by collapse of a cavern roof | Synonyms: sinkhole, swallow hole |
| (noun) (technology) a process that acts to absorb or remove energy or a substance from a system | - |
| (verb) fall heavily or suddenly; decline markedly | Synonyms: fall off, slump |
| (verb) embed deeply | Synonyms: bury |
| (verb) go under | Synonyms: go down, go under, settle |
| (verb) fall or descend to a lower place or level | Synonyms: drop, drop down |
| (verb) cause to sink | - |
| (verb) fall or sink heavily | Synonyms: slide down, slump |
| (verb) appear to move downward | Synonyms: dip |
| (verb) descend into or as if into some soft substance or place | Synonyms: subside |
| (verb) pass into a specified state or condition; sink into | Synonyms: lapse, pass |
| sinkable | (adjective) capable of being sunk | - |
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| sinker | (noun) a pitch that curves downward rapidly as it approaches the plate | - |
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| (noun) a weight that sinks (as to hold nets or fishing lines under water) | - |
| (noun) a small ring-shaped friedcake | Synonyms: donut, doughnut |
| sinkhole | (noun) a depression in the ground communicating with a subterranean passage (especially in limestone) and formed by solution or by collapse of a cavern roof | Synonyms: sink, swallow hole |
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| sinking | (noun) a descent as through liquid (especially through water) | - |
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| (noun) a slow fall or decline (as for lack of strength) | - |
| (noun) a feeling caused by uneasiness or apprehension | Synonyms: sinking feeling |
| sinless | (adjective) free from sin | Synonyms: impeccant, innocent |
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| sinlessness | (noun) the state of being unsullied by sin or moral wrong; lacking a knowledge of evil | Synonyms: innocence, pureness, purity, whiteness |
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| sinner | (noun) a person who sins (without repenting) | Synonyms: evildoer |
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| sinning | (adjective) transgressing a moral or divine law | - |
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| (noun) an act that is regarded by theologians as a transgression of God's will | Synonyms: sin |
| sinoper | (noun) a red ocher formerly used as a pigment | Synonyms: sinopia, sinopis |
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| sinopia | (noun) a red ocher formerly used as a pigment | Synonyms: sinoper, sinopis |
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| sinopis | (noun) a red ocher formerly used as a pigment | Synonyms: sinoper, sinopia |
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| sinter | (verb) cause (ores or powdery metals) to become a coherent mass by heating without melting | - |
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| sintered | (adjective) formed into a mass by heat and pressure | - |
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| sinuate | (adjective) curved or curving in and out | Synonyms: sinuous, wiggly |
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| (adjective) having a strongly waved margin alternately concave and convex | - |
| sinuosity | (noun) having bends (especially of streams and roads) | Synonyms: sinuousness |
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| sinuous | (adjective) curved or curving in and out | Synonyms: sinuate, wiggly |
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| (adjective) gracefully thin and bending and moving with ease | Synonyms: lissom, lissome, lithe, lithesome, supple |
| sinuously | (adverb) in a sinuous manner | - |
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| sinuousness | (noun) having bends (especially of streams and roads) | Synonyms: sinuosity |
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| sinus | (noun) a wide channel containing blood; does not have the coating of an ordinary blood vessel | Synonyms: venous sinus |
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| (noun) any of various air-filled cavities especially in the bones of the skull | - |
| (noun) an abnormal passage leading from a suppurating cavity to the body surface | Synonyms: fistula |
| sinusitis | (noun) inflammation of one of the paranasal sinuses | - |
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| sinusoid | (noun) tiny endothelium-lined passages for blood in the tissue of an organ | - |
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| (noun) the curve of y=sin x | Synonyms: sine curve |
| sinusoidal | (adjective) having a succession of waves or curves | - |
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| sinusoidally | (adverb) in a sinusoidal manner | - |
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| sissiness | (noun) the trait of being effeminate (derogatory of a man) | Synonyms: effeminacy, effeminateness, softness, unmanliness, womanishness |
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| socialising | (noun) the act of meeting for social purposes | Synonyms: socialisation, socialization, socializing |
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| sousing | (noun) the act of making something completely wet | Synonyms: drenching, soaking, souse |
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| stabilising | (adjective) causing to become stable | Synonyms: stabilizing |
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| streptolysin | (noun) any of several hemolysins derived from strains of streptococcus | - |
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| supervising | (noun) management by overseeing the performance or operation of a person or group | Synonyms: oversight, superintendence, supervision |
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| surpassing | (adjective) far beyond what is usual in magnitude or degree | Synonyms: exceeding, exceptional, olympian, prodigious |
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| (adjective) exceeding or surpassing usual limits especially in excellence | Synonyms: transcendent |
| surpassingly | (adverb) to an extraordinary degree | Synonyms: passing |
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| surprising | (adjective) causing surprise or wonder or amazement | - |
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| surprisingly | (adverb) in a surprising manner | - |
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| (adverb) in an amazing manner; to everyone's surprise | Synonyms: amazingly, astonishingly |
| surprisingness | (noun) extraordinariness by virtue of being unexpected | Synonyms: unexpectedness |
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| symbolising | (noun) the act of representing something with a symbol | Synonyms: symbolizing |
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| synchronising | (noun) an adjustment that causes something to occur or recur in unison | Synonyms: synchronisation, synchronization, synchronizing |
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| tantalising | (adjective) very pleasantly inviting | Synonyms: tantalizing, tempting |
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| (adjective) arousing desire or expectation for something unattainable or mockingly out of reach | Synonyms: tantalizing |
| teasing | (adjective) causing irritation or annoyance | Synonyms: annoying, bothersome, galling, irritating, nettlesome, pesky, pestering, pestiferous, plaguey, plaguy, vexatious, vexing |
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| (adjective) playfully vexing (especially by ridicule) | Synonyms: mocking, quizzical |
| (adjective) arousing sexual desire without intending to satisfy it | - |
| (noun) the act of harassing someone playfully or maliciously (especially by ridicule); provoking someone with persistent annoyances | Synonyms: ribbing, tantalization, tease |
| (noun) playful vexation | - |
| (noun) the act of removing tangles from you hair with a comb | Synonyms: comb-out |
| teasingly | (adverb) in a playfully teasing manner | Synonyms: tauntingly |
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| teleprocessing | (noun) data processing in which some of the functions are performed in different places and connected by transmission facilities | Synonyms: distributed data processing, remote-access data processing |
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| terazosin | (noun) antihypertensive drug (trade name Hytrin) used to treat high blood pressure | Synonyms: Hytrin |
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| tetramethyldiarsine | (noun) a poisonous oily liquid with a garlicky odor composed of 2 cacodyl groups; undergoes spontaneous combustion in dry air | Synonyms: cacodyl |
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| thymosin | (noun) hormone secreted by the thymus; stimulates immunological activity of lymphoid tissue | - |
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| tipsiness | (noun) a temporary state resulting from excessive consumption of alcohol | Synonyms: drunkenness, inebriation, inebriety, insobriety, intoxication |
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| tocsin | (noun) a bell used to sound an alarm | Synonyms: warning bell |
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| (noun) the sound of an alarm (usually a bell) | Synonyms: alarm bell |
| tranquilising | (adjective) tending to soothe or tranquilize | Synonyms: ataractic, ataraxic, sedative, tranquilizing, tranquillising, tranquillizing |
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| tranquillising | (adjective) tending to soothe or tranquilize | Synonyms: ataractic, ataraxic, sedative, tranquilising, tranquilizing, tranquillizing |
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| trespassing | (adjective) gradually intrusive without right or permission | Synonyms: encroaching, invasive |
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| trypsin | (noun) an enzyme of pancreatic origin; catalyzes the hydrolysis of proteins to smaller polypeptide units | - |
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| trypsinogen | (noun) inactive precursor of trypsin; a substance secreted by the pancreas and converted to active trypsin by enterokinase in the small intestine | - |
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| tsine | (noun) wild ox of the Malay Archipelago | Synonyms: banteng, banting, Bos banteng |
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| tyrosine | (noun) an amino acid found in most proteins; a precursor of several hormones | - |
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| tyrosinemia | (noun) autosomal recessive defect in tyrosine metabolism resulting in liver and kidney disturbances and mental retardation | - |
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| unappetising | (adjective) not appetizing in appearance, aroma, or taste | Synonyms: unappetizing |
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| unappetisingness | (noun) the property of spoiling the appetite | Synonyms: unappetizingness |
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| unceasing | (adjective) uninterrupted in time and indefinitely long continuing | Synonyms: ceaseless, constant, incessant, never-ending, perpetual, unremitting |
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| (adjective) continuing forever or indefinitely | Synonyms: aeonian, ageless, eonian, eternal, everlasting, perpetual, unending |
| unceasingly | (adverb) with unflagging resolve | Synonyms: ceaselessly, continuously, endlessly, incessantly, unendingly |
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| uncompromising | (adjective) not making concessions | Synonyms: inflexible, sturdy |
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| uncompromisingly | (adverb) in an uncompromising manner | - |
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| uncousinly | (adjective) not befitting a cousin | - |
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| uneasiness | (noun) inability to rest or relax or be still | Synonyms: queasiness, restlessness |
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| (noun) the trait of seeming ill at ease | Synonyms: disquiet, unease |
| (noun) embarrassment deriving from the feeling that others are critically aware of you | Synonyms: self-consciousness, uncomfortableness |
| (noun) feelings of anxiety that make you tense and irritable | Synonyms: disquietude, edginess, inquietude |
| (noun) physical discomfort (as mild sickness or depression) | Synonyms: malaise, unease |
| unenterprising | (adjective) lacking in enterprise; not bold or venturesome | Synonyms: nonenterprising |
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| unimposing | (adjective) lacking in impressiveness | - |
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| unpleasing | (adjective) unpleasant or disagreeable to the senses | - |
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| unpleasingness | (noun) the quality of being unpleasant to to the senses | - |
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| unprepossessing | (adjective) creating an unfavorable or neutral first impression | Synonyms: unpresentable |
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| unpromising | (adjective) unlikely to bring about favorable results or enjoyment | - |
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| unsinkable | (adjective) incapable of being sunk | - |
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