| 释义 |
prefix
prefixPrefixes are morphemes (specific groups of letters with particular semantic meaning) that are added onto the beginning of roots and base words to change their meaning. Prefixes are one of the two predominant kinds of affixes—the other kind is suffixes, which come at the end of a root word.Unlike suffixes, which can be either inflectional (changing only the grammatical function of a word without changing its basic meaning) or derivational (creating a word with an entirely new meaning), prefixes can only be derivational; adding a prefix always changes the basic meaning of the word.Continue reading...pre·fix P0520800 (prē′fĭks′)tr.v. pre·fixed, pre·fix·ing, pre·fix·es 1. To put or attach before or in front of.2. (prē-fĭks′) To settle or arrange in advance.3. Grammar a. To add as a prefix.b. To add a prefix to.n.1. Grammar An affix, such as dis- in disbelieve, attached to the front of a word to produce a derivative word or an inflected form.2. A letter, word, abbreviation, or number placed before a name, address, or other identifying label to indicate class or category: You have to indicate on the form whether you prefer the prefix Mr., Ms., or Dr.
[Middle English prefixen, from Old French prefixer : pre-, before (from Latin prae-; see pre-) + fixer, to place (from Latin fīxus, past participle of fīgere, to fasten; see dhīgw- in Indo-European roots). N., from New Latin praefīxum, from neuter sing. of Latin praefīxus, past participle of praefīgere, to fix in front : prae-, pre- + fīgere, to fasten.]
pre′fix′al adj.pre′fix′al·ly adv.pre′fix·a′tion (-fĭk-sā′shən), pre·fix′ion (-fĭk′shən) n.prefix n 1. (Grammar) grammar an affix that precedes the stem to which it is attached, as for example un- in unhappy. Compare suffix1 2. something coming or placed before vb (tr) 3. to put or place before4. (Grammar) grammar to add (a morpheme) as a prefix to the beginning of a word prefixal adj ˈprefixally adv prefixion npre•fix (n. ˈpri fɪks; v. also priˈfɪks)
n. 1. an affix placed before a base or another prefix, as un- in unkind, un- and re- in unrewarding. 2. something prefixed, as a title before a person's name. v.t. 3. to fix or put before or in front. 4. to add as a prefix. 5. to fix, settle, or appoint beforehand. [1375–1425; (v.) late Middle English < Middle French prefixer < Latin praefixus, past participle of praefīgere to set up in front; see pre-, fix; (n.) < New Latin praefixum, neuter of praefixus] pre•fix•al (ˈpri fɪk səl, priˈfɪk-) adj. pre′fix•al•ly, adv. pre`fix•a′tion, pre•fix′ion (-ˈfɪk ʃən) n. prefix
Past participle: prefixed
Gerund: prefixing
| Present |
|---|
| I prefix | | you prefix | | he/she/it prefixes | | we prefix | | you prefix | | they prefix |
| Preterite |
|---|
| I prefixed | | you prefixed | | he/she/it prefixed | | we prefixed | | you prefixed | | they prefixed |
| Present Continuous |
|---|
| I am prefixing | | you are prefixing | | he/she/it is prefixing | | we are prefixing | | you are prefixing | | they are prefixing |
| Present Perfect |
|---|
| I have prefixed | | you have prefixed | | he/she/it has prefixed | | we have prefixed | | you have prefixed | | they have prefixed |
| Past Continuous |
|---|
| I was prefixing | | you were prefixing | | he/she/it was prefixing | | we were prefixing | | you were prefixing | | they were prefixing |
| Past Perfect |
|---|
| I had prefixed | | you had prefixed | | he/she/it had prefixed | | we had prefixed | | you had prefixed | | they had prefixed |
| Future |
|---|
| I will prefix | | you will prefix | | he/she/it will prefix | | we will prefix | | you will prefix | | they will prefix |
| Future Perfect |
|---|
| I will have prefixed | | you will have prefixed | | he/she/it will have prefixed | | we will have prefixed | | you will have prefixed | | they will have prefixed |
| Future Continuous |
|---|
| I will be prefixing | | you will be prefixing | | he/she/it will be prefixing | | we will be prefixing | | you will be prefixing | | they will be prefixing |
| Present Perfect Continuous |
|---|
| I have been prefixing | | you have been prefixing | | he/she/it has been prefixing | | we have been prefixing | | you have been prefixing | | they have been prefixing |
| Future Perfect Continuous |
|---|
| I will have been prefixing | | you will have been prefixing | | he/she/it will have been prefixing | | we will have been prefixing | | you will have been prefixing | | they will have been prefixing |
| Past Perfect Continuous |
|---|
| I had been prefixing | | you had been prefixing | | he/she/it had been prefixing | | we had been prefixing | | you had been prefixing | | they had been prefixing |
| Conditional |
|---|
| I would prefix | | you would prefix | | he/she/it would prefix | | we would prefix | | you would prefix | | they would prefix |
| Past Conditional |
|---|
| I would have prefixed | | you would have prefixed | | he/she/it would have prefixed | | we would have prefixed | | you would have prefixed | | they would have prefixed |
prefixA word or word part that is added to the beginning of another word, such as “dis-” in “dislike.”Thesaurus| Noun | 1. | prefix - an affix that is added in front of the wordaffix - a linguistic element added to a word to produce an inflected or derived formalpha privative - the negative prefix a- or un- | | Verb | 1. | prefix - attach a prefix to; "prefixed words"affix - attach or become attached to a stem word; "grammatical morphemes affix to the stem"suffix - attach a suffix to; "suffix words" |
Translationsprefix (ˈpriːfiks) noun a syllable or syllables put at the beginning of another word to change its meaning. dislike; unemployed; remake; ineffective. 前綴 前缀
prefix
prefix (something) to (something else)To attach a particular prefix to the beginning of a word. Confusingly, prefixing "in-" to "flammable" doesn't create a negative, which is what you would normally expect. You need to prefix something to it if you want to change it from a noun to a verb.See also: prefixprefix something to somethingto place something at the beginning of a word or part of a word. If you prefix a re- to some verbs, you get an entirely different meaning. You can't prefix anything to some verbs.See also: prefixprefix
prefixPrefixes are morphemes (specific groups of letters with particular semantic meaning) that are added onto the beginning of roots and base words to change their meaning. Prefixes are one of the two predominant kinds of affixes—the other kind is suffixes, which come at the end of a root word.Unlike suffixes, which can be either inflectional (changing only the grammatical function of a word without changing its basic meaning) or derivational (creating a word with an entirely new meaning), prefixes can only be derivational; adding a prefix always changes the basic meaning of the word.Continue reading...prefix (unit)The standard metric prefixes used in the Syst?me International d'Units (SI) conventions for scientificmeasurement.
Here are the SI magnifying prefixes, along with thecorresponding binary interpretations in common use:
prefix abr decimal binary
yocto- 1000^-8zepto- 1000^-7atto- 1000^-6femto- f 1000^-5pico- p 1000^-4nano- n 1000^-3micro- * 1000^-2 * Abbreviation: Greek mumilli- m 1000^-1
kilo- k 1000^1 1024^1 = 2^10 = 1,024mega- M 1000^2 1024^2 = 2^20 = 1,048,576giga- G 1000^3 1024^3 = 2^30 = 1,073,741,824tera- T 1000^4 1024^4 = 2^40 = 1,099,511,627,776peta- 1000^5 1024^5 = 2^50 = 1,125,899,906,842,624exa- 1000^6 1024^6 = 2^60 = 1,152,921,504,606,846,976zetta- 1000^7 1024^7 = 2^70 = 1,180,591,620,717,411,303,424yotta- 1000^8 1024^8 = 2^80 = 1,208,925,819,614,629,174,706,176
"Femto" and "atto" derive not from Greek but from Danish.
The abbreviated forms of these prefixes are common inelectronics and physics.
When used with bytes of storage, these prefixes usually denotemultiplication by powers of 1024 = 2^10 (K, M, and G arecommon in computing). Thus "MB" stands for megabytes (2^20bytes). This common practice goes against the edicts of theBIPM who deprecate the use of these prefixes for powers oftwo. The formal SI prefix for 1000 is lower case "k"; some,including this dictionary, use this strictly, reserving uppercase "K" for multiplication by 1024 (KB is thus "kilobytes").
Also, in data transfer rates the prefixes stand for powers often so, for example, 28.8 kb/s means 28,800 bits per second.
The unit is often dropped so one may talk of "a 40K salary"(40000 dollars) or "2 meg of disk space" (2*2^20 bytes).
The accepted pronunciation of the initial G of "giga-" ishard, /gi'ga/.
Confusing 1000 and 1024 (or other powers of 2 and 10 close inmagnitude) - for example, describing a memory in units of 500Kor 524K instead of 512K - is a sure sign of the marketroid.For example, 3.5" microfloppies are often described asstoring "1.44 MB". In fact, this is completely specious. Thecorrect size is 1440 KB = 1440 * 1024 = 1474560 bytes. Alas,this point is probably lost on the world forever.
In 1993, hacker Morgan Burke proposed, to general approval onUsenet, the following additional prefixes: groucho (10^-30),harpo (10^-27), harpi (10^27), grouchi (10^30). This wouldleave the prefixes zeppo-, gummo-, and chico- available forfuture expansion. Sadly, there is little immediate prospectthat Mr. Burke's eminently sensible proposal will be ratified.prefix (language)Related to the prefix notation.Prefix an affix, part of a word that comes before the root and changes its lexical or grammatical meaning, for example, its aspect. In the Indo-European languages, the relation between prefixes and adverbs and certain prepositions can be traced historically. Prefixes can enter into the composition of nearly all autoseman-tic words except numerals and pronouns. Several prefixes may occur in a word, such as the Russian po-na-s-bival. In some Indo-European languages there are prefixes that, when stressed in certain verbal forms, become separated from the verb and are placed after it—for example, German weggehen, “to go away,” and geheweg, “go away”; but beschreiben, “to describe,” and beschreibe, “describe.” In some languages, such as Swahili, the prefix is the principal type of affix. In the Caucasian and Semitic languages, verb conjugation is totally or primarily of the prefixal type. prefixThe beginning or to add to the beginning. To prefix a header onto a packet means to place the header characters in front of the packet. "To prefix" at the beginning is the opposite of "to append" characters at the end. See prepend.See PREF
See PREFprefix
Antonyms for prefixnoun an affix that is added in front of the wordRelated Wordsverb attach a prefix toRelated WordsAntonyms |