Energy, Health, Energetic, Healthy
noun, な adjective
What is the origin of your energy? It is your health. This word also means energy, and when it's used as an adjective it means healthy or energetic.
げんき
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
お父さんは、元気ですか。
How is your father?
エマちゃんは、元気いっぱいですね。
Ema is full of energy.
元気そうなのに、ずっとくしゃみをしてる。
They're sneezing all the time, but they look fine.