prefix
/ˈpri:fɪks; `priˌfɪks/ n
1 (abbreviated as pref in this dictionary 本词典中略为pref) word or syllable (eg co-, ex-, non-, pre-, re-) placed in front of a word to add to or change the meaning of that word, eg un- in unhappy 前缀（置於单词之前, 以增加或改变其意义的词或音节, 如 co-、 ex-、 non-、 pre-、 re-, 又如 unhappy 中的 un-）.
2 word (eg Dr, Mrs, etc) placed before a person's name as a title （人名前的）称谓（如Dr、 Mrs等）. Cf 参看 suffix.
prefix / ˌpri:ˈfɪks; pri`fɪks/ v [Tn, Tn.pr]
~ sth (to sth)
1 add sth at the beginning or as an introduction 将某事物加在前面
The official prefixed an explanatory note to the list of statistics. 那官员在统计表前加了一段说明文字.
2 add sth as a prefix (to a word, name, etc) （在单词上）加前缀; （在人名前）加称谓.