Denshi Jisho — Online Japanese dictionary

けんこう health; sound; wholesome
Common word, Na-adjective, Noun 
あんこう calm and peaceful period of time
Noun, Obscure term 
しょうこう lull
Common word, Noun 
不健 ふけんこう poor health; ill health; unhealthy
Common word, Na-adjective, Noun 

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