prefix

noun

/ˈpriːfɪks/

(grammar语法) a letter or group of letters added to the beginning of a word to change its meaning, such as un- in unhappy and pre- in preheat前缀（缀于单词前以改变其意义的字母或字母组合）
- negative prefixes such as ‘un-’ and ‘dis-’否定前缀，如“un-”和“dis-”
compare affix, suffixTopics Languageb1
a word, letter or number that is put before another前置代号（置于前面的单词或字母、数字）
- Car insurance policies have the prefix MC (for motor car).汽车保险单标有 MC 代号（表示汽车）。
(old-fashioned) a title such as Dr or Mrs used before a person’s name（人名前的）称谓Topics Family and relationshipsc2

词源mid 16th cent. (as a verb): from Old French prefixer, from Latin praefixus ‘fixed in front’, from the verb praefigere, from prae ‘before’ + figere ‘to fix’. The noun is from modern Latin praefixum, neuter (used as a noun) of praefixus, and dates from the mid 17th cent.

prefix

verb

/ˈpriːfɪks/

动词形式

present simple I / you / we / they prefix	/ˈpriːfɪks/ /ˈpriːfɪks/
he / she / it prefixes	/ˈpriːfɪksɪz/ /ˈpriːfɪksɪz/
past simple prefixed	/ˈpriːfɪkst/ /ˈpriːfɪkst/
past participle prefixed	/ˈpriːfɪkst/ /ˈpriːfɪkst/
-ing form prefixing	/ˈpriːfɪksɪŋ/ /ˈpriːfɪksɪŋ/

to add letters or numbers to the beginning of a word or number在…前面加（字母或数字）
- prefix A to B American members have the letters US prefixed to their code numbers.美国会员的代码前加了字母 US。
- prefix B with A Their code numbers are prefixed with US.他们的代码前加上了字母 US。
词源mid 16th cent. (as a verb): from Old French prefixer, from Latin praefixus ‘fixed in front’, from the verb praefigere, from prae ‘before’ + figere ‘to fix’. The noun is from modern Latin praefixum, neuter (used as a noun) of praefixus, and dates from the mid 17th cent.