lit. to spit out one's heart and spill blood (idiom); to work one's he
呕 · 7 strokes
Phonosemantic compound. 口 represents the meaning and 区 represents the sound. Simplified form of 嘔.
心 · 4 strokes
Depicts a heart.
沥 · 7 strokes
Phonosemantic compound. 氵 represents the meaning and 历 represents the sound. Simplified form of 瀝.
血 · 6 strokes
Depicts a drop of blood in a container (皿).
他呕心沥血写了十年，终于完成了这部巨著。
He worked painstakingly for ten years and finally completed this masterpiece.