strengthen

strengthen
[ˈstrɛŋθ(ə)n, -ŋkθ(ə)n]
verb
  1. make or become stronger
    加强,巩固;使坚强;变强
    [with obj.]he advises an application of fluoride to strengthen the teeth.
    他建议使用氟化物来强固牙齿。
    [no obj.]the wind won't strengthen until after dark.
    风在天黑后才会变强。
常用词组
strengthen someone's hand (或 hands)
  1. enable or encourage a person to act more vigorously or effectively
    使做事更强硬;使行动更有力
派生
strengthener
noun
英语宝典
考试词汇表