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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-”
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
Word Originmid 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.