Synonyms for slow

modified

1. Slow in motion

   sluggish, laggard, deliberate, gradual, moderate, loitering, leaden, creeping, inactive, torpid, slow moving, ultra-slow, crawling, imperceptible, snaillike, slow-paced, leisurely, glue-footed*, as slow as molasses*, as slow as molasses in January*.

   Antonyms fast*, swift, rapid.

2. Slow in starting

   dilatory, procrastinating, delaying, postponing, idle, indolent, tardy, torpid, lazy, apathetic, phlegmatic, inactive, fabian, sluggish, heavy, quiet, drowsy, inert, dreamy, sleepy, lethargic, stagnant, slothful, supine, passive, slack, negligent, remiss, listless, languorous, lackadaisical, disinclined, reluctant, hesitant, enervated, dormant, abeyant, potential, latent; see also late 1.

   Antonyms immediate*, alert, instant.

3. Slow in producing an effect

   belated, behindhand, backward, unpunctual, overdue, delayed, long-delayed, behindtime, regarded, impeded, detained, hindered, moss-backed.

   Antonyms busy*, diligent, industrious.

4. Dull or stupid

   stolid, tame, uninteresting; see dull 3. See syn. study at stupid.

verb

1. To become slower

   slacken, slow up, slow down, lag, loiter, quiet, relax, procrastinate, back water, back and fill, stall*, let up*, wind down*, ease up*, ease off*; see also sense 2, decrease 1, hesitate.

   Antonyms rise*, accelerate, mount.

2. To cause to become slower

   delay, postpone, decelerate, moderate, reduce, regulate, retard, detain, temper, qualify, decrease, diminish, hinder, impede, hold back, keep waiting, brake, curtail, check, curb, reef, shorten sail, cut down*, rein in*, cut back*; see also sense 1.