| abbatial | (adjective) of or having to do with or belonging to an abbey or abbot, or abbess | - |
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| adventitial | (adjective) of or pertaining to the adventitia | - |
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| agential | (adjective) of or relating to an agent or agency | - |
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| antenuptial | (adjective) relating to events before a marriage | Synonyms: premarital, prenuptial |
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| bestial | (adjective) resembling a beast; showing lack of human sensibility | Synonyms: beastly, brutal, brute, brutish |
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| celestial | (adjective) relating to or inhabiting a divine heaven | Synonyms: heavenly |
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| (adjective) of or relating to the sky | Synonyms: heavenly |
| (adjective) of heaven or the spirit | Synonyms: ethereal, supernal |
| circumferential | (adjective) lying around or just outside the edges or outskirts | - |
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| circumstantial | (adjective) fully detailed and specific about particulars | - |
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| confidential | (adjective) the level of official classification for documents next above restricted and below secret; available only to persons authorized to see documents so classified | - |
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| (adjective) denoting confidence or intimacy | - |
| (adjective) entrusted with private information and the confidence of another | - |
| (adjective) (of information) given in confidence or in secret | Synonyms: secret |
| consequential | (adjective) having important issues or results | Synonyms: eventful |
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| consubstantial | (adjective) regarded as the same in substance or essence (as of the three persons of the Trinity) | - |
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| coreferential | (adjective) relating to coreference | Synonyms: co-referent |
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| credential | (noun) a document attesting to the truth of certain stated facts | Synonyms: certificate, certification, credentials |
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| deferential | (adjective) showing deference | Synonyms: deferent, regardful |
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| differential | (adjective) relating to or showing a difference | - |
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| (adjective) involving or containing one or more derivatives | - |
| (noun) a bevel gear that permits rotation of two shafts at different speeds; used on the rear axle of automobiles to allow wheels to rotate at different speeds on curves | Synonyms: differential gear |
| (noun) a quality that differentiates between similar things | - |
| (noun) the result of mathematical differentiation; the instantaneous change of one quantity relative to another; df(x)/dx | Synonyms: derivative, derived function, differential coefficient, first derivative |
| equinoctial | (adjective) relating to an equinox (when the lengths of night and day are equal) | - |
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| (adjective) relating to the vicinity of the equator | - |
| (noun) the great circle on the celestial sphere midway between the celestial poles | Synonyms: celestial equator, equinoctial circle, equinoctial line |
| essential | (adjective) basic and fundamental | - |
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| (adjective) defining rights and duties as opposed to giving the rules by which rights and duties are established | Synonyms: substantive |
| (adjective) being or relating to or containing the essence of a plant etc | - |
| (adjective) of the greatest importance | Synonyms: all-important, all important, crucial, of the essence |
| (adjective) absolutely necessary; vitally necessary | Synonyms: indispensable |
| (noun) anything indispensable | Synonyms: necessary, necessity, requirement, requisite |
| evidential | (adjective) serving as or based on evidence | Synonyms: evidentiary |
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| existential | (adjective) relating to or dealing with existence (especially with human existence) | - |
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| (adjective) of or as conceived by existentialism | - |
| (adjective) derived from experience or the experience of existence | Synonyms: experiential |
| experiential | (adjective) relating to or resulting from experience | - |
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| (adjective) derived from experience or the experience of existence | Synonyms: existential |
| exponential | (adjective) of or involving exponents | - |
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| (noun) a function in which an independent variable appears as an exponent | Synonyms: exponential function |
| impartial | (adjective) showing lack of favoritism | - |
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| (adjective) free from undue bias or preconceived opinions | Synonyms: unprejudiced |
| inconsequential | (adjective) not following logically as a consequence | - |
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| (adjective) lacking worth or importance | Synonyms: inconsequent |
| inertial | (adjective) of or relating to inertia | - |
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| inessential | (adjective) not basic or fundamental | Synonyms: unessential |
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| (adjective) not absolutely necessary | - |
| (noun) anything that is not essential | Synonyms: nonessential |
| inferential | (adjective) relating to or having the nature of illation or inference | Synonyms: illative |
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| (adjective) derived or capable of being derived by inference | - |
| (adjective) based on interpretation; not directly expressed | - |
| (adjective) of reasoning; proceeding from general premisses to a necessary and specific conclusion | - |
| (adjective) resembling or dependent on or arrived at by inference | Synonyms: illative |
| influential | (adjective) having or exercising influence or power | - |
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| initial | (adjective) occurring at the beginning | - |
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| (noun) the first letter of a word (especially a person's name) | - |
| (verb) mark with one's initials | - |
| insubstantial | (adjective) lacking material form or substance; unreal | Synonyms: unreal, unsubstantial |
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| (adjective) lacking in nutritive value | - |
| (adjective) lacking solidity or strength | Synonyms: flimsy |
| interstitial | (adjective) of or relating to interstices | - |
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| intrasentential | (adjective) of or relating to constituents within a sentence | - |
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| jurisprudential | (adjective) relating to the science or philosophy of law or a system of laws | - |
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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 |
| nonessential | (adjective) not of prime or central importance | Synonyms: accidental, incidental |
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| (noun) anything that is not essential | Synonyms: inessential |
| nonresidential | (adjective) not residential | - |
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| nonspatial | (adjective) not spatial | - |
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| nuptial | (adjective) of or relating to a wedding | Synonyms: bridal, spousal |
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| palatial | (adjective) relating to or being a palace | - |
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| (adjective) suitable for or like a palace | - |
| partial | (adjective) showing favoritism | - |
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| (adjective) constituting or comprising a part or fraction of a possible whole or entirety | Synonyms: fractional |
| (adjective) (followed by `of' or `to') having a strong preference or liking for | Synonyms: fond |
| (adjective) being or affecting only a part; not total | - |
| (noun) the derivative of a function of two or more variables with respect to a single variable while the other variables are considered to be constant | Synonyms: partial derivative |
| (noun) a harmonic with a frequency that is a multiple of the fundamental frequency | Synonyms: overtone, partial tone |
| penitential | (adjective) showing or constituting penance | Synonyms: penitentiary |
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| pestilential | (adjective) likely to spread and cause an epidemic disease | Synonyms: pestiferous, pestilent, plaguey |
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| postnuptial | (adjective) relating to events after a marriage | - |
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| potential | (adjective) existing in possibility | Synonyms: possible |
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| (adjective) expected to become or be; in prospect | Synonyms: likely |
| (noun) the difference in electrical charge between two points in a circuit expressed in volts | Synonyms: electric potential, potential difference, potential drop, voltage |
| (noun) the inherent capacity for coming into being | Synonyms: potency, potentiality |
| precedential | (adjective) having precedence (especially because of longer service) | - |
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| preferential | (adjective) manifesting partiality | Synonyms: discriminatory |
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| prenuptial | (adjective) relating to events before a marriage | Synonyms: antenuptial, premarital |
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| presidential | (adjective) befitting a president | - |
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| (adjective) relating to a president or presidency | - |
| providential | (adjective) relating to or characteristic of providence | - |
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| (adjective) peculiarly fortunate or appropriate; as if by divine intervention | Synonyms: heaven-sent, miraculous |
| (adjective) resulting from divine providence | Synonyms: divine |
| prudential | (adjective) arising from or characterized by prudence especially in business matters | - |
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| quintessential | (adjective) representing the perfect example of a class or quality | - |
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| referential | (adjective) referring or pointing to something | - |
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| residential | (adjective) used or designed for residence or limited to residences | - |
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| (adjective) of or relating to or connected with residence | - |
| reverential | (adjective) feeling or manifesting veneration | Synonyms: respectful, venerating |
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| sapiential | (adjective) characterized by wisdom, especially the wisdom of God | - |
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| sentential | (adjective) of or relating to a sentence | - |
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| sequential | (adjective) in regular succession without gaps | Synonyms: consecutive, sequent, serial, successive |
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| spatial | (adjective) pertaining to or involving or having the nature of space | Synonyms: spacial |
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| substantial | (adjective) having substance or capable of being treated as fact; not imaginary | Synonyms: material, real |
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| (adjective) of considerable importance, size, or worth | Synonyms: significant |
| (adjective) of or relating to the real nature or essential elements of something | Synonyms: substantive |
| (adjective) having an abundant supply of money or possessions of value | Synonyms: affluent, flush, loaded, moneyed, wealthy |
| (adjective) of good quality and condition; solidly built | Synonyms: solid, strong |
| (adjective) providing abundant nourishment | Synonyms: hearty, satisfying, solid, square |
| tangential | (adjective) of or relating to or acting along or in the direction of a tangent | - |
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| (adjective) of superficial relevance if any | Synonyms: digressive |
| torrential | (adjective) relating to or resulting from the action of a torrent | - |
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| (adjective) pouring in abundance | - |
| (adjective) resembling a torrent in force and abundance | - |
| undeferential | (adjective) not showing courteous respect | - |
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| unessential | (adjective) not basic or fundamental | Synonyms: inessential |
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| uninfluential | (adjective) not influential | - |
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| unpresidential | (adjective) not presidential | - |
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| unsubstantial | (adjective) lacking material form or substance; unreal | Synonyms: insubstantial, unreal |
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