Toughen

"Toughen" in Finnish

karkaista

(to make tougher)

karkaistua

(to become tougher)

koventaa

(to make tougher)

koventua

(to become tougher)

vahvistaa

(to make tougher)

vahvistua

(to become tougher)

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.