Meaning of くしんさんたん in Japanese
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Definition of くしんさんたん
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(n, vs) 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.