(usu + on) to become firmer or more severe
The government is tightening up on tax dodgers
to make (something) firmer or stricter
| 单词 | tighten up |
| 释义 | tighten upverb intrans(usu + on) to become firmer or more severe The government is tightening up on tax dodgers to make (something) firmer or stricter |
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