tighten : Idioms & Phrases
tighten one's belt
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verb live frugally and use less resources
- In the new economy, we all have to learn to tighten our belts
WordNet
tighten up
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verb restrict
stiffen; constrain; tighten.
- Tighten the rules
- stiffen the regulations
WordNet
Tightening pulley
(Mach.) , a pulley which rests, or is forced, against a driving belt to tighten it.