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stick by (someone or something)
To remain loyal to, committed to, or supportive of someone or something. I vowed to stick by my wife, no matter what happened to us. Do you still stick by your decision to fire him?
stick by someone or somethingand stick with someone or something
to support someone or something; to continue supporting or committing to someone or something when things are bad. Don't worry. I'll stick by you no matter what. I feel as if I have to stick by my brother even if he goes to jail.
Also, stick to. Remain loyal to, as in The brothers said they'd stick by one another, no matter what, or Phyllis promised to stick to Bert. This idiom derives from stick in the sense of "adhere." [Early 1500s] Also see stand by, def. 4.
1. To remain loyal or faithful to someone: Her family stuck by her through hard times.
2. To keep or maintain something: He is sticking by his opinion despite the new evidence.