The phrase "wait behind" refers to holding back and lingering behind. It can also mean waiting for someone or something to pass before proceeding. There are many synonyms for this phrase, including bide, linger, loiter, tarry, dally, idle, and delay. Each of these words carries a slightly different connotation, but they all relate to the act of waiting patiently or hesitantly. To bide one's time is to wait for the right moment to act. Linger implies a reluctance to leave. Loiter and dally suggest aimless or lazy waiting. Tarry indicates a deliberate delay. Idle suggests inaction or laziness. Regardless of the word used, waiting behind requires patience and a willingness to see the situation through until the timing is right.