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compost

KOM-pohst /ˈhɒmpoʊst/

nounverbB1IELTSTOEFL

neutral

Decayed organic material used as a plant fertilizer; to convert organic waste into fertilizer.

Refers to a deliberate, managed process of decomposition rather than random rotting.

The story behind the word. In Latin, 'componere' meant 'to put together' or 'to compound.' This gave rise to the Old French 'composte', referring to a mixture of organic materials thrown together to decay. It is a linguistic cousin of 'composite' and 'composition,' reminding us that compost is a deliberate, structured mixture, not just random rot.

Word relationships

fertilizer: Fertilizer can be synthetic or chemical, whereas compost is strictly organic and made from decayed matter.
humus: Humus is the fully stable organic matter in soil, while compost is the actively managed mixture used to create it.

Commonly confused with

mulch: Mulch is placed on top of soil to retain moisture (like wood chips); compost is mixed into soil to provide nutrients.

Word family

compostable (adjective): Capable of being turned into compost.
composting (noun): The process of making compost.

Collocations

compost pile
compost bin
organic compost
make compost

Example sentences

"Adding compost to your garden soil improves its structure and provides essential nutrients for your plants." Home gardening guide
"The city encourages residents to compost their kitchen scraps to reduce the volume of waste sent to landfills." Municipal recycling initiative

Memory hook

COM- (together) + POST (put) -> putting organic things together to make soil. Put together to rot.

When not to use

Do not use to describe raw, fresh organic waste; it only becomes compost after it has decomposed.

Fun facts

A healthy compost pile can reach temperatures of up to 150°F (65°C) due to the intense activity of heat-loving bacteria.