Stroke count: 13
Meaning: be superior, heal, more and more, increasingly, finally, beyond doubt
Kunyomi: いよいよ まさ.る
Onyomi: ユ
Composition: 兪 心
Radical: 心
Meaning: heart
愈 （いよいよ） more and more, all the more, increasingly, at last, finally, beyond doubt, (at the) last moment, worst possible time