British spelling: the present participle and gerund of 'colonialise'; the ongoing process of bringing territories under colonial control or establishing colonial rule.
From 'colonialise' + '-ing,' following standard British English verbal patterns. The progressive form emphasizes the action as a process rather than a completed event.
Historians use 'colonialising' to emphasize colonialism as an active, deliberate process—not something that just happened, but something powerful nations systematically did to build empires over centuries.
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