1
noun (common) (futsuumeishi)noun or participle which takes the aux. verb suruintransitive verb
pains;hard work;effort;trouble;labour;labor
苦心の甲斐があった。
That was well worth the trouble.
1
noun (common) (futsuumeishi)noun or participle which takes the aux. verb suruintransitive verb
yojijukugo
taking great pains
苦心惨憺の末、考え出した企画が、会議で一瞬にして却下されちゃうんだからな。
After all the trouble we went to in coming up with that project, it only took them a second to shoot it down in the meeting.
Other forms
苦心惨澹 【くしんさんたん】