| miss the boat(verb, expression, idiom, decline, fall) |
| mold(verb, decline, weaken, lessen, degenerate) |
| molder(verb, decline, weaken, lessen, degenerate) |
| mortify(verb, decline, weaken, lessen, degenerate) |
| pejorate(verb, decline, weaken, lessen, degenerate) |
| perish(verb, decline, weaken, lessen, degenerate) |
| pine(verb, drop, fall, fail, diminish) |
| play into(verb, expression, phrasal verb, decline, fall) |
| pollute(verb, decline, weaken, lessen, degenerate) |
| putrefy(verb, decline, weaken, lessen, degenerate) |
| putresce(verb, decline, weaken, lessen, degenerate) |
| reach depths(verb, expression, decline, weaken, lessen) |
| rot(verb, drop, decline, fall, fail) |
| run aground(verb, expression, decline, fall, fail) |
| sap(verb, decline, weaken, lessen, degenerate) |
| shrivel(verb, decline, weaken, lessen, degenerate) |
| sicken(verb, decline, weaken, lessen, degenerate) |
| slide(verb, drop, decline, fall, fail) |
| spoil(verb, decline, fail, lower, weaken) |
| subside(verb, drop, fall, fail, diminish) |