a serré, a resserré, a renforcé, a rendu plus strict
I tightened the nuts.
J’ai resserré les écrous.
Then he tightened his belt, and for years, he waited.
Puis il resserra sa ceinture et attendit pendant des années.
— Once Upon a Time in the West (1968)
I tightened one.
J’en ai resserré une.
The duke slowly tightened the rope.
Le duc resserra lentement la corde.
— The Handmaiden (2016)
Tom tightened the knot.
Tom resserra le nœud.
Get the damn thing tightened!
Resserrez ce satané truc !
— Das Boot (1981)
His face tightened.
Son visage se crispa.
Security has been tightened.
La sécurité a été renforcée.