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to tighten up
[phrase form: tighten]
01
to make something much more strict or limited
Grammatical Information
Composition
phrasal
Action verb
Regular
Separable
Particle
up
Base verb
tighten
Present tense
tighten up
3rd person singular
tightens up
Present participle
tightening up
Past simple
tightened up
Past participle
tightened up
Examples
The government is working to tighten up regulations on environmental standards.
