| thin(verb, adjective, strong, decline) |
| weaken(verb, calm, strong, decline) |
| adulterate(verb, decline, reduce, ruin) |
| reduce(verb, decline, fail, ease) |
| doctor(verb, reduce, ruin, thin) |
| lessen(verb, calm, decline, reduce) |
| attenuate(verb, strong, decline, reduce) |
| debase(verb, decline, reduce, fail) |
| diminish(verb, decline, reduce, fail) |
| moderate(verb, calm, decline, reduce) |
| decrease(verb, decline, reduce, fail) |
| water down(verb, expression, phrasal verb, decline) |
| corrupt(verb, thin, spoil, degrade) |
| degrade(verb, decline, reduce, ruin) |
| spike(verb, reduce, ruin, thin) |
| abate(verb, calm, decline, reduce) |
| alloy(verb, thin, spoil, corrupt) |
| contract(verb, decline, reduce, ease) |
| dissolve(verb, ruin, thin, spoil) |
| irrigate(verb, reduce, thin, water) |