| putresce(decline, weaken, lessen, degenerate, deteriorate) |
| quell(verb, stop, calm, drop, dull) |
| quieten(verb, calm, ease, diminish, decrease) |
| reach depths(expression, decline, weaken, lessen, degenerate) |
| relapse(verb, drop, decline, reduce, settle) |
| relent(verb, decline, diminish, decrease, lessen) |
| retreat(verb, drop, close, decline, reduce) |
| retrograde(verb, stop, drop, close, end) |
| rot(verb, stop, break, drop, end) |
| run down(verb, expression, stop, end, pass) |
| sap(verb, decline, reduce, fail, halt) |
| settle(verb, calm, drop, quiet, cut) |
| shave(verb, cut, reduce, diminish, lower) |
| sicken(verb, break, decline, fail, weaken) |
| slack off(verb, expression, phrasal verb, drop, cut) |
| slash(verb, drop, cut, decline, reduce) |
| slow(verb, stop, dull, fall, diminish) |
| soften(verb, drop, cut, decline, reduce) |
| soothe(verb, calm, quiet, cool, fall) |
| spoil(verb, decline, weaken, lessen, lapse) |