toughen

toughen
verb
  1. make or become stronger or more resilient
    (使)更坚强(或坚韧)
    [with obj.]he tried to toughen his son up by sending him to public school.
    他把儿子送进公学以使其变得更坚强。
    [no obj.]a falcon has scaly skin on its legs that toughens up very quickly.
    猎鹰的腿上有能很快硬化的鳞状皮。
    ■[with obj.]make (rules or a policy) stricter and more harsh
    使(规定,政策)更为严格,苛刻
    proposals to toughen up sentencing policy.
    关于强化判决政策的建议。
派生
toughener
noun
英语宝典
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