Strenuous

"Strenuous" in bg

енергичен

energičen

(having great vigour)

напрегнат

napregnat

(requiring great exertion)

усилен

usilen

(requiring great exertion)

усърден

usǎrden

(having great vigour)

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