| putrefy(verb, decline, weaken, lessen, degenerate) |
| decompose(verb, decline, weaken, lessen, degenerate) |
| decay(verb, deteriorate, crumble, rot, weep) |
| mortify(verb, decline, weaken, lessen, degenerate) |
| rot(verb, decline, weaken, lessen, degenerate) |
| suppurate(verb, decline, weaken, lessen, degenerate) |
| fester(verb, decay, rot, decompose, molder) |
| break up(verb, expression, phrasal verb, decline, weaken) |
| crumble(verb, decline, weaken, lessen, degenerate) |
| disintegrate(verb, decline, weaken, lessen, degenerate) |
| mildew(verb, decline, weaken, lessen, degenerate) |
| mold(verb, decline, weaken, lessen, degenerate) |
| molder(verb, decline, weaken, lessen, degenerate) |
| spoil(verb, decline, weaken, lessen, degenerate) |
| be impaired(verb, decline, weaken, lessen, degenerate) |
| become contaminated(verb, expression, decline, weaken, lessen) |
| blight(verb, decline, weaken, lessen, degenerate) |
| collapse(verb, decline, weaken, lessen, degenerate) |
| corrode(verb, decline, weaken, lessen, degenerate) |
| curdle(verb, decline, weaken, lessen, degenerate) |