Definition of prefix

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Prefix (v. t.) To set or appoint beforehand; to settle or establish antecedently.

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Augment :: Augment (n.) A vowel prefixed, or a lengthening of the initial vowel, to mark past time, as in Greek and Sanskrit verbs..
Hemi- :: Hemi- () A prefix signifying half.
Pseudo- :: Pseudo- () A combining form or prefix signifying false, counterfeit, pretended, spurious; as, pseudo-apostle, a false apostle; pseudo-clergy, false or spurious clergy; pseudo-episcopacy, pseudo-form, pseudo-martyr, pseudo-philosopher. Also used adjectively..
Privative :: Privative (n.) A privative prefix or suffix. See Privative, a., 3..
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..
Pro- :: Pro- () A prefix signifying before, in front, forth, for, in behalf of, in place of, according to; as, propose, to place before; proceed, to go before or forward; project, to throw forward; prologue, part spoken before (the main piece); propel, prognathous; provide, to look out for; pronoun, a word instead of a noun; proconsul, a person acting in place of a consul; proportion, arrangement according to parts..
Deut- :: Deut- () A prefix which formerly properly indicated the second in a regular series of compound in the series, and not to its composition, but which is now generally employed in the same sense as bi-or di-, although little used..
Levo- :: Levo- () A prefix from L. laevu.
Co- :: Co- () A form of the prefix com-, signifying with, together, in conjunction, joint. It is used before vowels and some consonants. See Com-..
To :: To (prep.) As sign of the infinitive, to had originally the use of last defined, governing the infinitive as a verbal noun, and connecting it as indirect object with a preceding verb or adjective; thus, ready to go, i.e., ready unto going; good to eat, i.e., good for eating; I do my utmost to lead my life pleasantly. But it has come to be the almost constant prefix to the infinitive, even in situations where it has no prepositional meaning, as where the infinitive is direct object or subject; th
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..
Inter- :: Inter- () A prefix signifying among, between, amid; as, interact, interarticular, intermit..
Prolegomenon :: Prolegomenon (n.) A preliminary remark or observation; an introductory discourse prefixed to a book or treatise.
In- :: In- (prep.) A prefix from Eng. prep. in, also from Lat. prep. in, meaning in, into, on, among; as, inbred, inborn, inroad; incline, inject, intrude. In words from the Latin, in- regularly becomes il- before l, ir- before r, and im- before a labial; as, illusion, irruption, imblue, immigrate, impart. In- is sometimes used with an simple intensive force..
I :: I- (prefix.) See Y-.
Ab- :: Ab- () A prefix in many words of Latin origin. It signifies from, away , separating, or departure, as in abduct, abstract, abscond. See A-(6)..
Post- :: Post- () A prefix signifying behind, back, after; as, postcommissure, postdot, postscript..
Exo :: Exo () A prefix signifying out of, outside; as in exocarp, exogen, exoskeleton..
Un- :: Un- (adv.) Those which have acquired an opposed or contrary, instead of a merely negative, meaning; as, unfriendly, ungraceful, unpalatable, unquiet, and the like; or else an intensive sense more than a prefixed not would express; as, unending, unparalleled, undisciplined, undoubted, unsafe, and the like..
Arch- :: Arch- () A prefix signifying chief, as in archbuilder, archfiend..
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