| break down(verb, expression, phrasal verb, break, dull) |
| foul(verb, adjective, hurt, dirty, corrupt) |
| suppurate(verb, decline, weaken, lessen, gather) |
| become rotten(expression, idiom) |
| curdle(verb, dull, decline, spoil, weaken) |
| decline(noun, verb, break, collapse, split) |
| defile(verb, decline, hurt, ruin, harm) |
| degenerate(verb, break, beat, decline, crush) |
| fade(verb, decline, weaken, lessen, degenerate) |
| mildew(verb, decline, weaken, lessen, degenerate) |
| addle(verb, decay, taint, rot, decompose) |
| break up(verb, expression, break, beat, decline) |
| collapse(verb, break, beat, decline, crush) |
| corrode(verb, decline, weaken, lessen, degenerate) |
| dirty(verb, adjective, hurt, dirty, corrupt) |
| dissolve(verb, beat, decline, crush, weaken) |
| necrose |
| pollute(verb, decline, hurt, harm, spoil) |
| rankle(verb, uncleanness) |
| sink(verb, break, decline, collapse, split) |