| avifaunal | (adjective) of or relating to birds of a particular region or period | Synonyms: avifaunistic |
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| cislunar | (adjective) situated between the earth and the moon | Synonyms: sublunar, sublunary |
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| communal | (adjective) relating to a small administrative district or community | - |
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| (adjective) for or by a group rather than individuals | - |
| fortunate | (adjective) having unexpected good fortune | - |
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| (adjective) presaging good fortune | Synonyms: rosy |
| (adjective) supremely favored | Synonyms: golden |
| importunate | (adjective) persistent to the point of annoying | - |
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| (adjective) expressing persistant and earnest entreaty | - |
| lunar | (adjective) of or relating to or associated with the moon | - |
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| lunate | (adjective) resembling the new moon in shape | Synonyms: crescent-shaped, crescent, semilunar |
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| lunatic | (adjective) insane and believed to be affected by the phases of the moon | Synonyms: moonstruck |
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| misfortunate | (adjective) deserving or inciting pity | Synonyms: hapless, miserable, pathetic, piteous, pitiable, pitiful, poor, wretched |
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| runaway | (adjective) completely out of control | - |
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| semilunar | (adjective) resembling the new moon in shape | Synonyms: crescent-shaped, crescent, lunate |
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| sublunar | (adjective) situated between the earth and the moon | Synonyms: cislunar, sublunary |
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| (adjective) of this earth | Synonyms: sublunary, terrestrial |
| sublunary | (adjective) situated between the earth and the moon | Synonyms: cislunar, sublunar |
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| (adjective) of this earth | Synonyms: sublunar, terrestrial |
| superlunar | (adjective) situated beyond the moon or its orbit around the earth | Synonyms: superlunary, translunar, translunary |
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| (adjective) unworldly or ethereal | Synonyms: superlunary, translunar, translunary |
| superlunary | (adjective) situated beyond the moon or its orbit around the earth | Synonyms: superlunar, translunar, translunary |
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| (adjective) unworldly or ethereal | Synonyms: superlunar, translunar, translunary |
| translunar | (adjective) situated beyond the moon or its orbit around the earth | Synonyms: superlunar, superlunary, translunary |
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| (adjective) unworldly or ethereal | Synonyms: superlunar, superlunary, translunary |
| translunary | (adjective) situated beyond the moon or its orbit around the earth | Synonyms: superlunar, superlunary, translunar |
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| (adjective) unworldly or ethereal | Synonyms: superlunar, superlunary, translunar |
| unabashed | (adjective) not embarrassed | Synonyms: unembarrassed |
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| unabated | (adjective) continuing at full strength or intensity | - |
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| unable | (adjective) (usually followed by `to') not having the necessary means or skill or know-how | - |
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| (adjective) lacking in power or forcefulness | Synonyms: ineffective, ineffectual |
| (adjective) (usually followed by `to') lacking necessary physical or mental ability | - |
| unabridged | (adjective) (used of texts) not shortened | - |
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| unabused | (adjective) not physically abused; treated properly | - |
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| unaccented | (adjective) (used of syllables) carrying no stress | Synonyms: atonic |
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| (adjective) (used of vowels or syllables) pronounced with little or no stress | Synonyms: light, weak |
| unacceptable | (adjective) not acceptable; not welcome | - |
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| (adjective) (used of persons or their behavior) not acceptable or reasonable | Synonyms: impossible |
| (adjective) not conforming to standard usage | Synonyms: unaccepted |
| (adjective) not adequate to give satisfaction | - |
| unaccepted | (adjective) not conforming to standard usage | Synonyms: unacceptable |
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| unaccessible | (adjective) capable of being reached only with great difficulty or not at all | Synonyms: inaccessible |
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| unaccommodating | (adjective) not accommodating | Synonyms: unobliging |
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| (adjective) offering no assistance | - |
| unaccompanied | (adjective) being without an escort | - |
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| (adjective) playing or singing without accompaniment | - |
| (adjective) (of a state or an event) taking place without something specified occurring at the same time | - |
| unaccountable | (adjective) not to be accounted for or explained | Synonyms: unexplainable |
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| (adjective) free from control or responsibility | - |
| unaccredited | (adjective) lacking official approval | Synonyms: unlicenced, unlicensed |
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| unaccustomed | (adjective) unusual or unfamiliar | - |
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| unachievable | (adjective) impossible to achieve | Synonyms: unattainable, undoable, unrealizable |
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| unacknowledged | (adjective) not recognized or admitted | - |
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| (adjective) not openly acknowledged | - |
| unacquainted | (adjective) having little or no knowledge of | Synonyms: unacquainted with, unfamiliar with |
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| (adjective) not knowledgeable about something specified | Synonyms: innocent |
| unacquisitive | (adjective) not acquisitive; not interested in acquiring or owning anything | - |
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| unactable | (adjective) not actable | - |
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| unadaptable | (adjective) not adaptable | - |
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| unadapted | (adjective) not having adapted to new conditions | Synonyms: unadjusted |
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| (adjective) not changed in form or character for a purpose | - |
| unaddicted | (adjective) not addicted | - |
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| unaddressed | (adjective) not addressed | - |
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| unadjustable | (adjective) not adjustable | - |
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| unadjusted | (adjective) not altered to fit certain requirements | - |
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| (adjective) not having adapted to new conditions | Synonyms: unadapted |
| unadoptable | (adjective) difficult to place in an adoptive home | - |
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| unadorned | (adjective) not decorated with something to increase its beauty or distinction | Synonyms: undecorated |
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| unadulterated | (adjective) not mixed with impurities | - |
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| (adjective) without qualification; used informally as (often pejorative) intensifiers | Synonyms: arrant, complete, consummate, double-dyed, everlasting, gross, perfect, pure, sodding, staring, stark, thorough, thoroughgoing, utter |
| unadventurous | (adjective) lacking in boldness | - |
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| unadvisable | (adjective) not prudent or wise; not recommended | Synonyms: inadvisable |
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| unadvised | (adjective) without careful prior deliberation or counsel | Synonyms: ill-advised |
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| (adjective) having received no information | - |
| unaerated | (adjective) (used of blood) not supplied with oxygen | Synonyms: unoxygenated |
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| unaesthetic | (adjective) violating aesthetic canons or requirements; deficient in tastefulness or beauty | Synonyms: inaesthetic |
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| unaffected | (adjective) undergoing no change when acted upon | - |
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| (adjective) free of artificiality; sincere and genuine | - |
| (adjective) emotionally unmoved | Synonyms: unmoved, untouched |
| (adjective) unaware of or indifferent to | Synonyms: insensible |
| unaffecting | (adjective) not arousing affect | - |
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| unaffectionate | (adjective) lacking affection or warm feeling | Synonyms: detached, uncaring |
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| unaffiliated | (adjective) not affiliated | - |
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| unaffixed | (adjective) not affixed | Synonyms: loose |
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| unafraid | (adjective) oblivious of dangers or perils or calmly resolute in facing them | Synonyms: fearless |
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| (adjective) free from fear or doubt; easy in mind | Synonyms: secure, untroubled |
| unaged | (adjective) not subjected to an aging process | - |
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| unaggressive | (adjective) not aggressive; not given to fighting or assertiveness | Synonyms: nonaggressive |
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| unagitated | (adjective) not agitated or disturbed emotionally | - |
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| (adjective) not physically disturbed or set in motion | - |
| (adjective) not agitated; without losing self-possession | Synonyms: calm, serene, tranquil |
| unaided | (adjective) carried out without aid or assistance | - |
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| unaired | (adjective) lacking fresh air | Synonyms: airless, close, stuffy |
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| unairworthy | (adjective) not fit to fly | - |
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| unalarming | (adjective) not alarming; assuaging alarm | - |
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| unalert | (adjective) not alert to what is potentially dangerous | Synonyms: unvigilant, unwatchful |
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| unalienable | (adjective) incapable of being repudiated or transferred to another | Synonyms: inalienable |
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| unalike | (adjective) not alike or similar | Synonyms: dissimilar |
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| unalloyed | (adjective) free from admixture | - |
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| unalterable | (adjective) not capable of being changed or altered | Synonyms: inalterable |
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| (adjective) of a sentence; that cannot be changed | - |
| (adjective) remaining the same for indefinitely long times | Synonyms: changeless |
| unaltered | (adjective) remaining in an original state | Synonyms: unchanged |
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| unambiguous | (adjective) having or exhibiting a single clearly defined meaning | - |
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| (adjective) admitting of no doubt or misunderstanding; having only one meaning or interpretation and leading to only one conclusion | Synonyms: unequivocal, univocal |
| unambitious | (adjective) having little desire for success or achievement | Synonyms: ambitionless |
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| unamended | (adjective) (of legislation) not amended | - |
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| unanalyzable | (adjective) representing the furthest possible extent of analysis or division into parts | Synonyms: undecomposable |
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| unanalyzed | (adjective) not analyzed or broken down for detailed examination | - |
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| unangry | (adjective) not angry | - |
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| unanimated | (adjective) not animated or enlivened; dull | - |
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| unanimous | (adjective) in complete agreement | Synonyms: consentaneous, consentient |
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| (adjective) acting together as a single undiversified whole | Synonyms: solid, whole |
| unannealed | (adjective) (of metal or glass) not annealed and consequently easily cracked or fractured | Synonyms: brittle |
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| unannounced | (adjective) without warning or announcement | Synonyms: unheralded, unpredicted |
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| unanswerable | (adjective) impossible to answer | - |
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| unanswered | (adjective) not returned in kind | Synonyms: unreciprocated, unrequited |
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| unanticipated | (adjective) not anticipated | Synonyms: out of the blue, unforeseen, unlooked-for, unseen |
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| unapologetic | (adjective) unwilling to make or express an apology | - |
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| unappareled | (adjective) having removed clothing | Synonyms: unattired, unclad, undressed, ungarbed, ungarmented |
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| unapparent | (adjective) not readily apparent | - |
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| unappealable | (adjective) not subject to appeal | - |
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| unappealing | (adjective) not able to attract favorable attention | - |
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| (adjective) (of characters in literature or drama) tending to evoke antipathetic feelings | Synonyms: unlikable, unlikeable, unsympathetic |
| unappeasable | (adjective) not to be placated or appeased or moved by entreaty | Synonyms: grim, inexorable, relentless, stern, unforgiving, unrelenting |
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| unappendaged | (adjective) not having an appendage | - |
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| unappetising | (adjective) not appetizing in appearance, aroma, or taste | Synonyms: unappetizing |
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| unappetizing | (adjective) not appetizing in appearance, aroma, or taste | Synonyms: unappetising |
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| unappreciated | (adjective) having value that is not acknowledged | Synonyms: unsung, unvalued |
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| (adjective) not likely to be rewarded | Synonyms: thankless, ungratifying |
| unappreciative | (adjective) not feeling or expressing gratitude | - |
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| unapprehensive | (adjective) not recognizing or slow to recognize danger | - |
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| unapproachable | (adjective) discouraging intimacies; reserved | - |
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| (adjective) inaccessibly located or situated | Synonyms: out of reach, unreachable, unreached |
| unarbitrary | (adjective) not subject to individual determination | Synonyms: nonarbitrary |
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| unarguable | (adjective) against which no argument can be made | Synonyms: inarguable |
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| unargumentative | (adjective) not given to or characterized by argument | - |
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| unarmed | (adjective) (used of persons or the military) not having or using arms | - |
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| (adjective) (used of plants or animals) lacking barbs or stings or thorns | - |
| unarmored | (adjective) (used of persons or things military) without protective armor | Synonyms: unarmoured |
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| (adjective) used of animals; without protective covering | Synonyms: unarmoured |