| retarded(adjective, late, delayed, overdue) |
| slothful(adjective, dull, quiet, easy, slow) |
| behind(adjective, adverb, dull, low, slow) |
| dawdling(adjective, slow, late, delayed, overdue) |
| dragging(adjective, slow, boring, tedious, late) |
| inactive(adjective, dull, idle, sluggish, late) |
| lackadaisical(dull, slow, careless, sluggish, lazy) |
| lagging(adjective, dull, quiet, easy, slow) |
| lazy(adjective, slow, careless, sluggish, late) |
| lingering(adjective, dull, low, slow, boring) |
| unhurried(adjective, slow, late, leisurely, remiss) |
| behind time(expression, idiom, adverb, slow, late) |
| creeping |
| dallying(adjective, dull, slow, careless, indifferent) |
| detained(adjective, dull, low, late, behind) |
| dull(adjective, low, careless, indifferent, idle) |
| gradual(adjective, dull, quiet, moderate, easy) |
| latish |
| lethargic(dull, idle, sluggish, lazy, inactive) |
| poky(adjective, slow, informal, fast) |