| behindhand | backward, tardy, sluggish |
| dull | dead, lifeless, sluggish, inactive |
| flagging | drooping, pendulous, sluggish |
| heavy | slow-moving, sluggish, laggard |
| muddy | [of a young deer] sluggish, lazy |
| muddy-mettled | sluggish, dull-spirited |
| resty | lazy, sluggish |
| resty-stiff | stiff because too rested, sluggish |
| sapless | feeble, sluggish, lacking vigour |
| slow-gaited | slow-moving, sluggish |
| stiff | unsupple, unathletic; or: lethargic, sluggish |
| still | lethargic, indolent, sluggish |
| tardy-gaited | slow-moving, sluggish |
| unactive | inactive, slothful, sluggish |