1.
Drop, be detached, drop off.
2.
Withdraw, separate.
3.
Decline, wane, dwindle, decay, fade, fail, wither.
4.
Perish, die.
5.
Backslide, apostatize, fall away.
6.
Revolt, defect, become disaffected or disloyal, fall away.
7.
( Naut. ) Go to leeward.