languid vs strapping

Of a thing: lacking energy, liveliness, or strength; inactive, slow-moving, weak. 

Of an idea, writing, etc.: dull, uninteresting. 

Of a period of time: characterized by lack of activity; pleasant and relaxed; unstressful. 

Of a person or animal, or their body functions: flagging from weakness, or inactive or weak, especially due to illness or tiredness; faint, listless. 

Of a colour: not bright; dull, muted. 

Of a person or their actions, character, etc.: lacking drive, emotion, or enthusiasm; apathetic, listless, spiritless, unenthusiastic. 

Of a person or their movement: showing a dislike for physical effort; leisurely, unhurried. 

Having a sturdy muscular physique; robust.