| reach depths(verb, expression, decline, weaken, lessen) |
| rust(verb, hurt, reduce, destroy, smart) |
| sap(verb, decline, weaken, lessen, degenerate) |
| shrivel(verb, decline, weaken, lessen, degenerate) |
| sicken(verb, decline, weaken, lessen, degenerate) |
| sink(verb, break, decline, fail, lower) |
| slump(verb, decline, weaken, lessen, degenerate) |
| stagnate |
| turn sour |
| vanish(verb, decline, separate, exhaust, drain) |
| wane(verb, decline, weaken, lessen, degenerate) |
| waste(decline, destroy, cease, decay, debase) |
| weaken(decline, degenerate, deteriorate, decay, disintegrate) |
| wither(decline, sink, degenerate, deteriorate, decay) |
| worsen(verb, break, decline, fail, lower) |
| OD(decline, cease, decay, succumb, expire) |
| X-ray(verb, study, determine, resolve, examine) |
| ablate |
| adjourn |
| adulterate(decline, hurt, dirty, corrupt, degenerate) |