taper

to grow less in scope or intensity especially gradually you'll find the symptoms begin tapering gradually about 24 hours after you take the medicine Synonyms abate, decline, de-escalate, die (away or down or out), diminish, drain (away), drop (off), dwindle, ease, ebb, fall, fall away, lessen, let up, lower, moderate, pall, phase down, ratchet (down) also rachet (down), recede, relent, remit, shrink, subside, decrease, taper off, waneRelated Words compress, condense, constrict, contract; evaporate, fade (away), fritter (away), give out, melt (away), peter (out), tail (off), vanish; slacken, slow (down); alleviate, relax; flag, sink, weaken; cave (in), collapse, deflateNear Antonyms appear, emerge, show up; blow up, distend, elongate, lengthenAntonyms accumulate, balloon, build, burgeon (also bourgeon), enlarge, escalate, expand, grow, increase, intensify, mount, mushroom, pick up, rise, snowball, soar, swell, wax