英文词源
- biannual (adj.)
- also bi-annual; "occurring every six months, twice a year," 1837, from bi- + annual. Related: Biannually; bi-annually.
中文词源
前缀bi-, 二。词根ann, 年，见anniversary.
该词的英语词源请访问趣词词源英文版：biannual 词源，biannual 含义。
词根词缀： bi-两,二 + -ann-年 + -u- + -al形容词词尾
