stand by

verb4

1. •
   To do nothing. To be inactive in a situation.

   • I can't simply stand by and watch you ruin your life.
2. •
   To remain loyal or faithful to.

   • Even though money is scarce sometimes, Ann stands by her decision to be a full-time mother.
3. •
   To support; to continue to support despite things being bad.

   • They stood by us all along and it's awesome to see them out here to support us today.
4. •
   To wait in expectation of some event; to be ready.

   • Please stand by for more instructions.