English

imperially

From imperial + -ly.

A compound of imperial + -ly

Proto-Indo-European *perh₃- ‘to grant’

…

Latin imperium ‘empire, imperial government’

Latin imperiālis ‘of the empire or emperor, imperial’

Old French imperial

Middle English imperial

Today it means

adv In an imperial manner.

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

Etymograph / imperially