Past tense of compost; converted organic material into nutrient-rich soil through decomposition, or discarded as waste.
From 'compost' (Middle French 'composte' from Latin 'componere': to put together) plus -ed past tense suffix. Originally referred to a mixture of ingredients combined together.
Modern composting is an ancient practice rebranded for environmental consciousness—medieval farmers created 'compost heaps' from kitchen waste and manure, and they knew it magically transformed garbage into garden gold, but chemistry didn't understand why until the 20th century.
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