こ 肥やす Show inflections LinksSentence search for 肥やすSentence search for こやすSentence search for 肥すKanji details for 肥Edit in JMdict Godan verb with 'su' ending, Transitive verb1. to fertilize; to fertilise; to manure; to enrichOther forms肥す 【こやす】Notes肥す: Irregular okurigana usage. Discussions Log in to talk about this word.