a.
1.
Zealous, ardent, earnest, active, vigorous, resolute, energetic, eager.
2.
Vigorous, spirited, bold, valiant, intrepid, strong, determined, resolute, doughty.
STRENUOUS
Meaning of STRENUOUS in English
Soule. Dictionary of English synonyms. Словарь английских синонимов. 2012