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tighten

tighten /ˈtaɪtn̩/ verb
tightens; tightened; tightening
tighten
/ˈtaɪtn̩/
verb
tightens; tightened; tightening
Britannica Dictionary definition of TIGHTEN
: to make (something) tight or tighter or to become tight or tighter
[+ object]
[no object]

tighten the noose

see noose

tighten the screws

see 1screw

tighten up

[phrasal verb]
tighten up or tighten (something) up or tighten up (something)
: to become more strict or effective or to make (something) more strict or effective

tighten your belt

see 1belt