English

abustle

From a- (“in such a state”) + bustle.

Formed from a- ‘in such a state’ + bustle

Proto-Indo-European *uds- ‘up, out’

Proto-Germanic *uz- ‘out-’

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

English a-

Middle English bustlen

Today it means

adj Showing much activity.

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