to fold one's arms; to stand and watch (without interfering); to stand idly by; to lie in wait; to be ready and waiting
doing nothing (to help); watching with one's arms folded; bowing with one's hands locked together in front of one's chest (form of Chinese salute)
to look on with arms folded
to fold (one's) arms; to stand by and do nothing; to look on passively
to fold (one's) arms; to stand by and do nothing; to look on passively