| intellectual | (adjective) appealing to or using the intellect | - |
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| (adjective) involving intelligence rather than emotions or instinct | Synonyms: cerebral |
| (adjective) of or associated with or requiring the use of the mind | Synonyms: noetic, rational |
| intensional | (adjective) used of the set of attributes that distinguish the referents of a given word | - |
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| intentional | (adjective) done or made or performed with purpose and intent | Synonyms: designed, unintentional |
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| (adjective) characterized by conscious design or purpose | Synonyms: deliberate, knowing |
| interactional | (adjective) capable of acting on or influencing each other | Synonyms: interactive |
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| intercontinental | (adjective) extending or taking place between or among continents | - |
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| intercostal | (adjective) located or occurring between the ribs | - |
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| interdenominational | (adjective) occurring between or among or common to different churches or denominations | Synonyms: interchurch |
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| interdepartmental | (adjective) between or among departments | - |
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| interfacial | (adjective) relating to or situated at an interface | - |
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| interlineal | (adjective) written between lines of text | Synonyms: interlinear |
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| intermural | (adjective) between two or more institutions etc | - |
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| internal | (adjective) happening or arising or located within some limits or especially surface | - |
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| (adjective) inside the country | Synonyms: home, interior, national |
| (adjective) occurring within an institution or community | Synonyms: intragroup |
| (adjective) innermost or essential | Synonyms: inner, intimate |
| (adjective) located inward | Synonyms: inner, interior |
| international | (adjective) concerning or belonging to all or at least two or more nations | - |
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| (adjective) from or between other countries | Synonyms: external, outside |
| interpersonal | (adjective) occurring among or involving several people | - |
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| interracial | (adjective) involving or composed of different races | Synonyms: mixed |
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| (adjective) between races | - |
| intersexual | (adjective) having sexual characteristics intermediate between those of male and female | - |
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| (adjective) existing or occurring between the sexes | - |
| interstitial | (adjective) of or relating to interstices | - |
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| intertidal | (adjective) of or relating to the littoral area above the low-tide mark | - |
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| intertribal | (adjective) between or among tribes | - |
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| intervertebral | (adjective) pertaining to the space between two vertebrae | - |
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| intestinal | (adjective) of or relating to or inside the intestines | Synonyms: enteral, enteric |
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| intimal | (adjective) of or relating to the intima | - |
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| intracerebral | (adjective) within the brain | - |
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| intracranial | (adjective) within the skull | - |
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| intradepartmental | (adjective) within a department | - |
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| intradermal | (adjective) relating to areas between the layers of the skin | Synonyms: intracutaneous, intradermic |
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| intramural | (adjective) carried on within the bounds of an institution or community | - |
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| intrasentential | (adjective) of or relating to constituents within a sentence | - |
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| intrinsical | (adjective) belonging to a thing by its very nature | Synonyms: intrinsic |
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| invitational | (adjective) pertaining to or characteristic of an invitation | - |
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| ipsilateral | (adjective) on or relating to the same side (of the body) | - |
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| ironical | (adjective) humorously sarcastic or mocking | Synonyms: dry, ironic, wry |
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| (adjective) characterized by often poignant difference or incongruity between what is expected and what actually is | Synonyms: ironic |
| irrational | (adjective) not consistent with or using reason | - |
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| (adjective) real but not expressible as the quotient of two integers | - |
| isobilateral | (adjective) having identical parts on each side of an axis | Synonyms: bilateral, bilaterally symmetric, bilaterally symmetrical |
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| isochronal | (adjective) equal in duration or interval | Synonyms: isochronous |
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| isoclinal | (adjective) having equal magnetic inclinations | Synonyms: isoclinic |
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| isometrical | (adjective) having equal dimensions or measurements | Synonyms: isometric |
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| isothermal | (adjective) of a process or change taking place at constant temperature | - |
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| jovial | (adjective) full of or showing high-spirited merriment | Synonyms: gay, jocund, jolly, merry, mirthful |
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| judgmental | (adjective) depending on judgment | - |
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| judicial | (adjective) relating to the administration of justice or the function of a judge | Synonyms: juridic, juridical |
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| (adjective) belonging or appropriate to the office of a judge | - |
| (adjective) expressing careful judgment | Synonyms: discriminative |
| (adjective) decreed by or proceeding from a court of justice | - |
| jural | (adjective) of or relating to law or to legal rights and obligations | Synonyms: juristic |
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| juridical | (adjective) relating to the administration of justice or the function of a judge | Synonyms: judicial, juridic |
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| (adjective) of or relating to the law or jurisprudence | Synonyms: juridic |
| jurisdictional | (adjective) restricted to the geographic area under a particular jurisdiction | - |
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| jurisprudential | (adjective) relating to the science or philosophy of law or a system of laws | - |
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| kaleidoscopical | (adjective) continually shifting or rapidly changing | Synonyms: kaleidoscopic |
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| labial | (adjective) relating to or near the female labium | - |
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| (adjective) of or relating to the lips of the mouth | - |
| lachrymal | (adjective) of or relating to tears | Synonyms: lacrimal |
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| (adjective) relating to or located near the organ that produces tears | Synonyms: lacrimal |
| lackadaisical | (adjective) idle or indolent especially in a dreamy way | - |
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| (adjective) lacking spirit or liveliness | Synonyms: dreamy, languid, languorous |
| lacrimal | (adjective) of or relating to tears | Synonyms: lachrymal |
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| (adjective) relating to or located near the organ that produces tears | Synonyms: lachrymal |
| lacteal | (adjective) relating to or consisting of or producing or resembling milk | - |
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| laminal | (adjective) arranged in or consisting of laminae | Synonyms: laminar |
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| larval | (adjective) relating to or typical of a larva | - |
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| (adjective) immature of its kind; especially being or characteristic of immature insects in the newly hatched wormlike feeding stage | - |
| laryngeal | (adjective) of or relating to or situated in the larynx | - |
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| laryngopharyngeal | (adjective) of or relating to the larynx and pharynx | - |
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| lateral | (adjective) lying away from the median and sagittal plane of a body | - |
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| (adjective) situated at or extending to the side | Synonyms: sidelong |
| latitudinal | (adjective) of or relating to latitudes north or south | - |
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| leal | (adjective) faithful and true | - |
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| legal | (adjective) established by or founded upon law or official or accepted rules | - |
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| (adjective) of or relating to jurisprudence | - |
| (adjective) relating to or characteristic of the profession of law | - |
| (adjective) allowed by official rules | - |
| (adjective) having legal efficacy or force | Synonyms: effectual, sound |
| lethal | (adjective) of an instrument of certain death | Synonyms: deadly |
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| lexical | (adjective) of or relating to words | - |
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| (adjective) of or relating to dictionaries | - |
| lexicographical | (adjective) of or relating to lexicography | Synonyms: lexicographic |
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| liberal | (adjective) tolerant of change; not bound by authoritarianism, orthodoxy, or tradition | - |
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| (adjective) showing or characterized by broad-mindedness | Synonyms: broad, large-minded, tolerant |
| (adjective) given or giving freely | Synonyms: big, bighearted, bounteous, bountiful, freehanded, giving, handsome, openhanded |
| (adjective) not literal | Synonyms: free, loose |
| (adjective) having political or social views favoring reform and progress | - |
| libidinal | (adjective) belonging to the libido | - |
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| lienal | (adjective) of or relating to the spleen | Synonyms: splenetic, splenic |
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| limnological | (adjective) of or relating to limnology | - |
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| lineal | (adjective) in a straight unbroken line of descent from parent to child | Synonyms: direct |
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| (adjective) arranged in a line | - |
| lingual | (adjective) consisting of or related to language | Synonyms: linguistic |
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| (adjective) pertaining to or resembling or lying near the tongue | - |
| literal | (adjective) limited to the explicit meaning of a word or text | - |
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| (adjective) without interpretation or embellishment | - |
| (adjective) avoiding embellishment or exaggeration (used for emphasis) | - |
| (adjective) being or reflecting the essential or genuine character of something | Synonyms: actual, genuine, real |
| littoral | (adjective) of or relating to a coastal or shore region | - |
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| liturgical | (adjective) of or relating to or in accord with liturgy | - |
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| local | (adjective) relating to or applicable to or concerned with the administration of a city or town or district rather than a larger area | - |
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| (adjective) affecting only a restricted part or area of the body | - |
| (adjective) of or belonging to or characteristic of a particular locality or neighborhood | - |
| logical | (adjective) capable of or reflecting the capability for correct and valid reasoning | - |
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| (adjective) marked by an orderly, logical, and aesthetically consistent relation of parts | Synonyms: coherent, consistent, ordered |
| (adjective) capable of thinking and expressing yourself in a clear and consistent manner | Synonyms: coherent, lucid |
| (adjective) based on known statements or events or conditions | Synonyms: legitimate |
| logistical | (adjective) of or relating to logistics | Synonyms: logistic |
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| longitudinal | (adjective) of or relating to lines of longitude | - |
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| (adjective) running lengthwise | - |
| (adjective) over an extended time | - |
| loyal | (adjective) steadfast in allegiance or duty | - |
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| (adjective) inspired by love for your country | Synonyms: patriotic |
| (adjective) unwavering in devotion to friend or vow or cause | Synonyms: fast, firm, truehearted |
| lucifugal | (adjective) light-avoiding | Synonyms: lucifugous |
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| lumbosacral | (adjective) of or relating to or near the small of the back and the back part of the pelvis between the hips | - |
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| luteal | (adjective) of or relating to the corpus luteum | - |
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| lyrical | (adjective) expressing deep emotion | Synonyms: lyric |
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| (adjective) suitable for or suggestive of singing | - |
| macroscopical | (adjective) large enough to be visible with the naked eye | Synonyms: macroscopic |
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| (adjective) visible to the naked eye; using the naked eye | Synonyms: macroscopic |
| magical | (adjective) possessing or using or characteristic of or appropriate to supernatural powers | Synonyms: charming, magic, sorcerous, witching, wizard, wizardly |
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| magisterial | (adjective) of or relating to a magistrate | - |
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| (adjective) used of a person's appearance or behavior; befitting an eminent person | Synonyms: distinguished, grand, imposing |
| (adjective) offensively self-assured or given to exercising usually unwarranted power | Synonyms: autocratic, bossy, dominating, high-and-mighty, peremptory |
| malarial | (adjective) of or infected by or resembling malaria | - |
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| managerial | (adjective) of or relating to the function or responsibility or activity of management | - |
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| mandibulofacial | (adjective) of or relating to the lower jaw and face | - |
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| maniacal | (adjective) wildly disordered | Synonyms: maniac |
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| manorial | (adjective) of or relating to or based on the manor | - |
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| manual | (adjective) requiring human effort | - |
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| (adjective) of or relating to the hands | - |
| (adjective) doing or requiring physical work | - |
| marginal | (adjective) of questionable or minimal quality | Synonyms: borderline |
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| (adjective) just barely adequate or within a lower limit | Synonyms: bare |
| (adjective) at or constituting a border or edge | Synonyms: fringy |
| (adjective) producing at a rate that barely covers production costs | - |
| marital | (adjective) of or relating to the state of marriage | Synonyms: married, matrimonial |
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| marmoreal | (adjective) of or relating to or characteristic of marble | Synonyms: marmorean |
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| marsupial | (adjective) of or relating to the marsupials | - |
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| martial | (adjective) of or relating to the armed forces | - |
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| (adjective) suggesting war or military life | Synonyms: warlike |
| (adjective) (of persons) befitting a warrior | Synonyms: soldierlike, soldierly, warriorlike |
| mastoidal | (adjective) relating to or resembling a nipple | Synonyms: mastoid |
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| material | (adjective) derived from or composed of matter | - |
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| (adjective) directly relevant to a matter especially a law case | - |
| (adjective) having substance or capable of being treated as fact; not imaginary | Synonyms: real, substantial |
| (adjective) having material or physical form or substance | Synonyms: corporeal |
| (adjective) concerned with or affecting physical as distinct from intellectual or psychological well-being | - |
| (adjective) concerned with worldly rather than spiritual interests | - |
| maternal | (adjective) characteristic of a mother | - |
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| (adjective) relating to or characteristic of or befitting a parent | Synonyms: parental, paternal |
| (adjective) relating to or derived from one's mother | - |
| (adjective) related on the mother's side | Synonyms: enate, enatic |
| mathematical | (adjective) relating to or having ability to think in or work with numbers | Synonyms: numerical |
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| (adjective) of or pertaining to or of the nature of mathematics | - |
| (adjective) characterized by the exactness or precision of mathematics | - |
| (adjective) statistically possible though highly improbable | - |
| (adjective) beyond question | - |
| matriarchal | (adjective) characteristic of a matriarchy | - |
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| matrilineal | (adjective) based on or tracing descent through the female line | Synonyms: matrilinear |
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