the.com/compost heap

means A pile where organic scraps and yard waste are left to rot and break down into nutrient-rich soil.

from 'Compost' traces back through Old French 'composte' to Latin 'compositum,' the past participle of 'componere' — 'to put together' (com- 'with' + ponere 'to place'). The Latin root originally described any mixture or preparation, and by the 1300s English had borrowed it for a mixed fruit preserve before it settled into its dirt-and-decay meaning; 'heap,' meanwhile, is just the plain old Germanic word for a pile, doing exactly what it says.