| countervail |
| crumble(verb, decline, fail, blow, lower) |
| decline(verb, fail, blow, lower, weaken) |
| decrease(verb, decline, reduce, fail, halt) |
| degrade(verb, decline, reduce, ruin, fail) |
| delve(verb, weaken, dig, tunnel, excavate) |
| demoralise |
| deprave(verb, decline, ruin, fail, lower) |
| destabilize(verb, challenge, weaken, overthrow, disrupt) |
| dint |
| discountenance(upset, depress, hindrance, extinguish, dishearten) |
| discredit(verb, reduce, diminish, weaken, lessen) |
| dismantle(harm, spoil, injure, deterioration) |
| dismiss |
| disorganize(upset, depress, deterioration, extinguish, dishearten) |
| dispirit(verb, upset, reduce, disturb, ruin) |
| disprove(verb, reduce, ruin, weaken, subdue) |
| disqualify(verb, stop, hurt, ruin, restrain) |
| dissuade |
| droop(verb, decline, fail, blow, lower) |