肥やし・肥し|こやしkoyashi[3]odaka (tail-high)

Common
Which spelling to use
肥やし肥やし is the most common written form. It combines kanji and kana and is the form learners are most likely to encounter and use.
肥し肥し is a less common written variant, also combining kanji and kana. Learners will encounter it less often than 肥やし.
Definitions
  1. nounmanure; night soil; dung; fertiliser; fertilizer
  2. nounsomething that will help one develop in the future
Synonyms & antonyms
  • Synonym肥料ひりょうNeutralThe most common Sino-Japanese word for fertiliser in daily life and farming; fine for flowers and garden trees, and figuratively as 「心の肥料」. More formal than 「肥やし」.
  • Synonym肥こえCasualColloquial word for manure, usually fertiliser made from human or animal waste; more rustic and earthy than 「肥やし」.

「肥やし」 is the native Japanese word for fertiliser, also used figuratively for what helps one grow, as in 「芸の肥やし」; for farming use 「肥料」, and for manure 「肥」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

Japanese definitions
  1. 肥料ひりょう。
  2. 成長せいちょうの糧かてとなるもの。
Kanji in this word
English equivalents

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