English

aflat

From a- + flat.

Formed from a- + flat

Proto-Indo-European *uds- ‘up, out’

Proto-Germanic *uz- ‘out-’

Proto-West Germanic *uʀ- ‘up, out, over’

English a-

Proto-Germanic *flataz ‘flat’

Old Norse flatr ‘flat, level’

Middle English flat ‘level’

English flat

Today it means

adv Level with the ground; lying flat.

Language periods are conventional ranges, not dates for this word.