Shirabe
苦心惨憺

苦心くしん

Common Noun Irregular Intransitive
English jmdict
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.

苦心惨憺くしんさんたん

Noun Irregular Intransitive
English jmdict
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】