English
imperialism
From imperial + -ism.
A compound of imperial + -ism
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
English imperial
Today it means
noun The policy of forcefully extending a nation's authority by territorial gain or by the establishment of economic and political dominance over other nations.
Language periods are conventional ranges, not dates for this word.
Etymograph / imperialism