| be impaired(verb, decline, weaken, lessen, degenerate) |
| become contaminated(verb, expression, decline, weaken, lessen) |
| blight(verb, break, decline, hurt, ruin) |
| break(verb, decline, hurt, ruin, fail) |
| burn up |
| bust |
| calm down(verb, expression, phrasal verb, drop, cut) |
| chafe(verb, rub, grind, wear, gall) |
| check(verb, drop, quiet, cut, decline) |
| come apart(verb, expression, phrasal verb, wear, shred) |
| contract(verb, drop, quiet, cut, decline) |
| curb(verb, drop, quiet, cut, decline) |
| curdle(verb, decline, weaken, lessen, degenerate) |
| cut down(verb, expression, phrasal verb, drop, cut) |
| damage(verb, break, hurt, cause, harm) |
| defile(verb, break, decline, hurt, ruin) |
| devaluate(verb, drop, quiet, cut, decline) |
| die(verb, dwindle) |
| die down(verb, expression, phrasal verb, drop, cut) |
| disappear(verb, stop, end, pass, fall) |