くしんさんたん 苦心惨憺 LinksSentence search for 苦心惨憺Sentence search for くしんさんたんSentence search for 苦心惨澹Kanji details for 苦, 心, 惨 and 憺Edit in JMdict Noun, Suru verb, Intransitive verb1. taking great painsYojijukugo (four character compound)Other forms苦心惨澹 【くしんさんたん】 Discussions Log in to talk about this word.