肥やし こやし Also written 肥し Meanings Noun manure; night soil; dung; fertiliser; fertilizer something that will help one develop in the future Kanji 肥 fatten. Read as こやし. Words containing 肥やし 肥やし桶 (こやしおけ) night soil pail タンスの肥やし (たんすのこやし) unused things (esp. clothing) 芸の肥やし (げいのこやし) something that will help develop one's artistic skill Jinuma: Japanese Dictionary · Word lists