tighten up
片語動詞所屬單字tighten
tighten up — 片語動詞
1. To make something stricter, more secure, or more effective.
1.片語動詞
釋義
加強
To make something stricter, more secure, or more effective.
例句
The school tightened up its rules on cell phone use.
We need to tighten up security after the recent theft.