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Con- :: Con- () A prefix, fr. L. cum, signifying with, together, etc. See Com-..

En- :: En- () A prefix from Gr. / in, meaning in; as, encephalon, entomology. See In-..

Trimethyl :: Trimethyl () A prefix or combining form (also used adjectively) indicating the presence of three methyl groups.

Prepositive :: Prepositive (a.) Put before; prefixed; as, a prepositive particle..

Confidence :: Confidence (n.) The state of mind characterized by one's reliance on himself, or his circumstances; a feeling of self-sufficiency; such assurance as leads to a feeling of security; self-reliance; -- often with self prefixed..

Prefixed :: Prefixed (imp. & p. p.) of Prefi.

Y :: Y () Y, the twenty-fifth letter of the English alphabet, at the beginning of a word or syllable, except when a prefix (see Y-), is usually a fricative vocal consonant; as a prefix, and usually in the middle or at the end of a syllable, it is a vowel. See Guide to Pronunciation, // 145, 178-9, 272..

Deka- :: Deka- () A prefix signifying ten. See Deca-.

Counter :: Counter (adv.) A prefix meaning contrary, opposite, in opposition; as, counteract, counterbalance, countercheck. See Counter, adv. & a..

Un- :: Un- (adv.) Un- is prefixed to nouns to express the absence of, or the contrary of, that which the noun signifies; as, unbelief, unfaith, unhealth, unrest, untruth, and the like..

A- :: A- () A, as a prefix to English words, is derived from various sources. (1) It frequently signifies on or in (from an, a forms of AS. on), denoting a state, as in afoot, on foot, abed, amiss, asleep, aground, aloft, away (AS. onweg), and analogically, ablaze, atremble, etc. (2) AS. of off, from, as in adown (AS. ofd/ne off the dun or hill). (3) AS. a- (Goth. us-, ur-, Ger. er-), usually giving an intensive force, and sometimes the sense of away, on, back, as in arise, abide, ago. (4) Old English

Mirza :: Mirza (n.) The common title of honor in Persia, prefixed to the surname of an individual. When appended to the surname, it signifies Prince..

Tetra- :: Tetra- () A combining form (also used adjectively) denoting four proportional or combining parts of the substance or ingredient denoted by the term to which it is prefixed, as in tetra-chloride, tetroxide..

Bin- :: Bin- () A euphonic form of the prefix Bi-.

Un- :: Un- (adv.) Un- is prefixed to adjectives, or to words used adjectively..

De- :: De- () A prefix from Latin de down, from, away; as in debark, decline, decease, deduct, decamp. In words from the French it is equivalent to Latin dis-apart, away; or sometimes to de. Cf. Dis-. It is negative and opposite in derange, deform, destroy, etc. It is intensive in deprave, despoil, declare, desolate, etc..

Ad- :: Ad- () As a prefix ad- assumes the forms ac-, af-, ag-, al-, an-, ap-, ar-, as-, at-, assimilating the d with the first letter of the word to which ad- is prefixed. It remains unchanged before vowels, and before d, h, j, m, v. Examples: adduce, adhere, adjacent, admit, advent, accord, affect, aggregate, allude, annex, appear, etc. It becomes ac- before qu, as in acquiesce..

Negative :: Negative (n.) A proposition by which something is denied or forbidden; a conception or term formed by prefixing the negative particle to one which is positive; an opposite or contradictory term or conception.

Infra :: Infra (adv.) Below; beneath; under; after; -- often used as a prefix.

Do–a :: Do–a (n.) Lady; mistress; madam; -- a title of respect used in Spain, prefixed to the Christian name of a lady..

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