resserrer

Etymology
From.

Verb

 * 1)  to retighten (knot, belt, screw, etc.)
 * 2)  to tighten (link, knot)
 * 3)  to become stricter (discipline)
 * 4)  to narrow (road, gap)
 * 1)  to narrow (road, gap)
 * 1)  to narrow (road, gap)