| corrupt(decline, hurt, destroy, dirty, degenerate) |
| crinkle |
| crumble into dust(expression, idiom, brittleness) |
| curdle(verb, dull, decline, spoil, weaken) |
| curtail(verb, drop, quiet, cut, decline) |
| cut down(expression, drop, cut, decline, reduce) |
| debase(verb, decline, hurt, fail, lower) |
| debilitate(verb, decline, fail, blow, lower) |
| defile(verb, decline, hurt, spoil, weaken) |
| deliquesce(break, sink, degenerate, decay, descend) |
| depreciate(verb, drop, cut, decline, reduce) |
| descend(break, decline, decrease, weaken, sink) |
| devaluate(verb, drop, quiet, cut, decline) |
| die away(verb, phrasal verb, decrease, nonincrease) |
| die down(expression, drop, cut, decline, reduce) |
| dilapidate(verb, stop, break, end, separate) |
| disappear(verb, stop, end, decline, separate) |
| disband(verb, break, part, separate, dismiss) |
| discolor(verb, decline, hurt, harm, spoil) |
| disimprove(verb, break, decline, fail, lower) |