Extremely tall or reaching high into the air; also used to mean impressively great or important.
From 'tower,' a tall structure, plus the present participle suffix '-ing.' The word 'tower' comes from Old French 'tour,' from Latin 'turris,' possibly from a Semitic source.
The word 'towering' does double duty in English—it describes both physical height and importance, which is why we call great achievements 'towering accomplishments,' as if they literally reach the sky!
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