vanish

vanish
verb
[no obj.]
  1. disappear suddenly and completely
    突然不见;消失
    Moira vanished without trace.
    莫伊拉消失得无影无踪。
    ■gradually cease to exist
    逐渐消失
    the environment is under threat — hedgerows and woodlands are vanishing.
    环境正受到威胁,一些灌木与森林在日渐消失。
  2. (Mathematics)become zero
    (数)变为零
语源
  1. Middle English: shortening of Old French e(s)vaniss-, lengthened stem of e(s)vanir, from Latin evanescere 'die away'
英语宝典
考试词汇表