gang - definition and synonyms

verb 

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/ɡæŋ/
present tense
I/you/we/theygang
he/she/itgangs
present participleganging
past tenseganged
past participleganged

phrasal verb

gang up on

[transitive]
present tense
I/you/we/theygang up on
he/she/itgangs up on
present participleganging up on
past tenseganged up on
past participleganged up on
gang up on someone to join together in a group to hurt, frighten, or fight someone

They feel that the international community is ganging up on them.