verb/ʁə.sɛ.ʁe/
to retighten (knot, belt, screw, etc.); to tighten (link, knot); to become stricter (discipline); to narrow (road, gap)
“Plus l'animal bougeait et plus la corde se resserrait autour de son cou.” — The more the animal moved, the more the rope tightened around its neck.
From re- (“again”) + serrer (“to tighten”).