side with somebody

Từ điển tiếng Anh - Cambridge Advanced Learners Dictionary

side with sb phrasal verb [ sides with sb siding with sb sided with sb sided with sb sided with sb ]
to support one person or group in an argument
• If ever there was any sort of argument, she'd always side with my father against me.
Thesaurus⁺: ↑Backing, supporting and defending ↑Defending and protecting
Main entry: side_{phrasal verb}