Synonyms of toughen in English:

toughen


See US English definition of toughen

See UK English definition of toughen

See Spanish definition of endurecer

verb

1‘this process tightens and toughens the wood fibres’

SYNONYMS
strengthen, fortify, reinforce, harden, stiffen, consolidate, temper, season, rigidify, thicken, coarsen
technical indurate, anneal, cement
ANTONYMS

soften

2‘measures to toughen prison discipline’

SYNONYMS
make stricter, make more severe, toughen up, stiffen, tighten
informal beef up

3‘eighteen months in the army toughened him’

SYNONYMS
harden, fortify, strengthen, give strength to, steel, harshen, make resilient
make unfeeling, brutalize, make callous, case-harden, inure