stand by

I will stand by you no matter what.

意味（1）

(idiomatic, intransitive) To wait in expectation of some event; to be ready.

Please stand by for more instructions.

意味（2）

(idiomatic, transitive) To remain loyal or faithful to.

Even though money is scarce sometimes, Ann stands by her decision to be a full-time mother.

意味（3）

(idiomatic, transitive) To support; to continue to support despite things being bad.

意味（4）

(intransitive) To do nothing. To be inactive in a situation.

I can't simply stand by and watch you ruin your life.