| Main Entry: | |
| Part of Speech: | verb |
| Definition: | deteriorate, weaken |
| Synonyms: | backslide, be overcome, be overtaken, degenerate, fade, fail, fall, fall back, lapse, recidivate, regress, retrogress, revert, sicken, sink, slide back, slip back, suffer, turn back, worsen |
| Antonyms: | get better, heal, progress, strengthen |