| fester(verb, irritate, aggravate, inflamed, intensify) |
| putrefy(verb, decline, weaken, lessen, gather) |
| decay(verb, irritate, aggravate, deteriorate, crumble) |
| putresce(verb, decline, weaken, lessen, degenerate) |
| decompose(verb, decline, weaken, lessen, degenerate) |
| mortify(verb, decline, weaken, lessen, degenerate) |
| break up(expression, decline, weaken, lessen, degenerate) |
| crumble(verb, decline, weaken, lessen, degenerate) |
| disintegrate(verb, decline, weaken, lessen, degenerate) |
| go bad(expression, decline, weaken, lessen, degenerate) |
| mildew(decline, weaken, lessen, degenerate, deteriorate) |
| mold(decline, weaken, lessen, degenerate, deteriorate) |
| molder(decline, weaken, lessen, degenerate, deteriorate) |
| spoil(verb, decline, weaken, lessen, degenerate) |
| be impaired(decline, weaken, lessen, degenerate, deteriorate) |
| become contaminated(expression, decline, weaken, lessen, degenerate) |
| blight(verb, decline, weaken, lessen, degenerate) |
| collapse(decline, weaken, lessen, degenerate, deteriorate) |
| corrode(verb, decline, weaken, lessen, degenerate) |
| curdle(verb, decline, weaken, lessen, degenerate) |