
Tighten up
Physical Adjustments
Used when describing adjustments to the tightness of material things.

After losing weight, he had to tighten up his belt.
Literal Tightening
Refers to physically making something more snug, often with hands or tools.

The maintenance crew needed to tighten up the bolts to prevent leaks.
Easily Overlooked
Sometimes used for small but important adjustments that could easily be forgotten.

I need to tighten up the laces on my sneakers before the race.
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