Vigorous describes something done with a lot of energy, strength, and enthusiasm — not gentle or slow at all. You can do vigorous exercise (the kind that makes you breathe hard and sweat), have a vigorous discussion (people arguing their points strongly and actively), or say a plant grows in a vigorous way (fast and strong). It's a positive word overall — it praises energy and health, rather than criticizing something as too rough.

精力充沛的、劇烈的、強健的