noun
Refers to decomposed organic matter used to improve soil, especially in gardening, farming, and household waste recycling contexts.
家庭の生ごみからコンポストを作る。
We make compost from household food scraps.
畑の土にコンポストを混ぜた。
I mixed compost into the field soil.
堆肥 is the native/kanji term for compost or manure-like fertilizer; コンポスト is the katakana term often used in gardening, recycling, and household composting contexts.
A katakana term; no language of origin or detailed historical derivation is specified.