means A period of ceasing work or movement to recover energy, or the state of being still and at ease.

from From Old English 'rest' or 'ræst,' meaning a bed, a resting place, or repose. It shares deep Germanic roots with words like German 'Rast' (a rest or halt) and is possibly tied to an ancient notion of a 'league' or distance — the stretch you'd travel before stopping to rest. The sense of stillness came first; the meaning 'the remainder, what's left over' is a separate word entirely, borrowed much later from French 'reste.'