Synonyms of stiffen

Verb

1. stiffen, change

usage: become stiff or stiffer; "He stiffened when he saw his boss enter the room"

2. stiffen, change, alter, modify

usage: make stiff or stiffer; "Stiffen the cream by adding gelatine"

3. stiffen, tighten, tighten up, constrain, restrict, restrain, trammel, limit, bound, confine, throttle

usage: restrict; "Tighten the rules"; "stiffen the regulations"

Definition and meaning of stiffen (Dictionary)