腐心 ふしん taking great pains (to do) #12,221 Meanings noun, takes する, intransitive taking great pains (to do); making every effort; having a lot of trouble (doing); racking one's brains Its kanji 腐 フ · くさ.る、-くさ.る、くさ.れる、くさ.れ、くさ.らす、くさ.す rot, decay, sour 心 シン · こころ、-ごころ heart, mind, spirit, heart radical (no. 61)