苦心
くしん
☆ noun (common) (futsuumeishi)
☆ kind. vs
◆ pain, trouble, anxiety, diligence, hard work
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 tookthem a second to shoot it down in the meeting.