| dwindle(verb, decline, use, weaken, lessen) |
| fade(verb, break, decline, hurt, ruin) |
| lessen(verb, decline, reduce, fail, lower) |
| molder(verb, decline, weaken, lessen, degenerate) |
| putrefy(verb, decline, weaken, lessen, degenerate) |
| sink(verb, decline, reduce, ruin, destroy) |
| spoil(verb, break, dull, decline, hurt) |
| wane(verb, decline, blow, weaken, lessen) |
| waste away(expression, decline, weaken, lessen, exhaust) |
| atrophy(verb, decline, blow, weaken, lessen) |
| be impaired(verb, decline, weaken, lessen, degenerate) |
| become contaminated(expression, decline, weaken, lessen, degenerate) |
| collapse(verb, decline, reduce, slip, weaken) |
| curdle(verb, decline, weaken, lessen, degenerate) |
| debilitate(verb, decline, hurt, ruin, destroy) |
| defile(verb, break, dull, decline, hurt) |
| depreciate(verb, decline, fail, lower, weaken) |
| disable(verb, hurt, ruin, destroy, blow) |
| discolor(verb, break, dull, decline, hurt) |
| dry-rot(verb, decline, weaken, lessen, degenerate) |