bullying
US /ˈbʊl.i.ɪŋ/
UK /ˈbʊl.i.ɪŋ/

1.
the use of strength or influence to harm or intimidate those who are weaker
:
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The school has a strict policy against bullying.
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He reported the bullying incident to his teacher.
1.
using superior strength or influence to intimidate (someone), typically to force him or her to do what one wants
:
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He was accused of bullying his employees.
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Stop bullying your little brother!