In a manner that harasses or bothers someone; in a way that is harassing or annoying.
From 'harassing' (present participle of harass) plus the adverb suffix '-ly.' This forms an adverb describing how an action is performed in a harassing way.
When someone acts 'harassingly,' they're deliberately or consistently bothering you in ways that upset or stress you out—it's a word that captures intentional annoyance!
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