| become contaminated(expression, decline, weaken, lessen, degenerate) |
| blight(verb, decline, weaken, lessen, degenerate) |
| brace(verb, close, set, fix, settle) |
| buttress(verb, close, set, fix, settle) |
| candy(verb, strengthen, tense, reinforce, chill) |
| cement(verb, close, set, fix, settle) |
| clog |
| clotting |
| collapse(verb, decline, weaken, lessen, degenerate) |
| corrode(verb, decline, pain, weaken, lessen) |
| crumble(verb, dull, decline, spoil, weaken) |
| decline(verb, weaken, lessen, degenerate, deteriorate) |
| defile(verb, decline, weaken, lessen, degenerate) |
| degenerate(verb, decline, weaken, lessen, deteriorate) |
| depreciate(verb, decline, weaken, lessen, degenerate) |
| deteriorate(verb, decline, weaken, lessen, degenerate) |
| discolor(verb, decline, weaken, lessen, degenerate) |
| disintegrate(verb, dull, decline, spoil, weaken) |
| dissolve(verb, decline, weaken, lessen, degenerate) |
| dry-rot(verb, decline, weaken, lessen, degenerate) |