English

alop

From a- + lop.

Formed from a- + lop

Proto-Indo-European *uds- ‘up, out’

Proto-Germanic *uz- ‘out-’

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

English a-

Medieval Latin loppa

Middle English loppe ‘bough’

English lop

Today it means

adj Leaning over on one side; lopsided.

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