Synonyms of stiffen in English:

stiffen


See definition of stiffen

verb

1‘stir until the mixture stiffens’

SYNONYMS

become stiff, thicken

set, become solid, solidify, harden, gel, congeal, coagulate, clot

2‘she stiffened her muscles’

SYNONYMS

become rigid, become stiff, make rigid, make stiff, tense, tense up, tighten, tauten

rigidify

technical ankylose

ANTONYMS

relax

3‘attempts to intimidate them have only stiffened their resolve’

SYNONYMS

strengthen, harden, toughen, fortify, give strength to, reinforce, brace, steel, give a boost to

ANTONYMS

weaken