Repeatedly using physical strength or status to intimidate, harm, or humiliate someone weaker; aggressive behavior to force someone to do what you want.
From 'bully' (possibly from Dutch 'boel' meaning 'lover' or 'friend,' which then came to mean a hired thug or swaggerer). The meaning shifted over time from a tough person to someone who abuses others.
The word 'bully' might originally have meant 'friend' in Dutch, but it completely flipped meaning—showing how a word can do a total 180 when it moves to a new language and culture.
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