In a way that involves doing something with energy and effort, not passively or lazily.
From Latin 'activus' (doing, moving), from 'agere' (to do or act). The '-ly' suffix converts the adjective 'active' into an adverb form.
The root 'agere' (to act) is so fundamental to human experience that it spawned hundreds of English words—agent, agenda, act, react, exaggerate—all from people doing things!
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