lull
vb
1 allay, calm, compose, hush, lullaby, pacify, quell, quiet, rock to sleep, soothe, still, subdue, tranquillize
2 abate, cease, decrease, diminish, dwindle, ease off, let up, moderate, quieten down, slacken, subside, wane
n
3 calm, calmness, hush, let-up (informal) pause, quiet, respite, silence, stillness, tranquillity