In a manner that shows a tendency to give orders and want control; in a domineering way.
From 'bossy' (adjective) plus the adverbial suffix '-ly'. The '-ly' suffix transforms adjectives into adverbs that describe how an action is performed.
Adding '-ly' to adjectives is one of English's most productive word-making patterns, but it's also one of the reasons English sounds awkward sometimes—'bossily' feels clunky compared to how other languages handle this.
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