rus: энергичный

Information
has URI	http://lexvo.org/id/term/rus/%D1%8D%D0%BD%D0%B5%D1%80%D0%B3%D0%B8%D1%87%D0%BD%D1%8B%D0%B9

Meaning
means	(adjective) taxing to the utmost; testing powers of endurance; "his final, straining burst of speed"; "a strenuous task"; "your willingness after these six arduous days to remain here"- F.D.Roosevelt arduous, strenuous, straining