Vocabulary
苦心
くしん
pains; hard work; effort; trouble; labour; labor
noun
suru-verb
vi
N2
freq #22
Example sentences
その歌手（かしゅ）はファンの群（むら）がる中（なか）を苦心（くしん）して進（すす）んだ。
The singer fought his way through the crowd of fans.