せいだ 精を出す Show inflections LinksSentence search for 精を出すSentence search for せいをだすKanji details for 精 and 出Edit in JMdict Expressions (phrases, clauses, etc.), Godan verb with 'su' ending1. to work hard; to work diligently; to do one's best; to try one's hardest Discussions Log in to talk about this word.