brew

bridle, check, constrain, curb, discourage, hold, inhibit, regulate, rein (in), restrain, tame

allay, calm, quiet, settle, soothe, still, subdue, tranquilize (also tranquillize)

abate, decline, de-escalate, die down, diminish, disappear, dwindle, ebb, fade, fall, lessen, let up, lower, moderate, recede, relent, remit, shrink, subside, taper, taper off, vanish, wane

fall back, pass, recede, retreat, withdraw