| deteriorate(verb, weakness, failure) |
| develop a fault(verb, neglect, failure, expression) |
| die away(verb, weakness, failure, expression) |
| dim(verb, weakness, failure) |
| diminish(verb, weakness, failure) |
| disappear(verb, weakness, failure) |
| disappoint(verb, neglect, ignorance, abandoning) |
| dissolve(verb, weakness, failure) |
| do the dirty on(verb, expression, neglect, informal) |
| dwindle(verb, weakness, failure) |
| ebb(verb, weakness, failure) |
| fade(verb, weakness, failure) |
| fall flat(verb, failure, unsuccess, expression) |
| fall short of expectations(verb, neglect, ignorance, abandoning, expression) |
| fall through(verb, failure, unsuccess, expression) |
| fizzle out(verb, failure, unsuccess, expression) |
| flatline(verb, failure, unsuccess) |
| flop(verb, failure, unsuccess) |
| flunk(verb, informal, failure) |
| fold(verb, failure, unsuccess) |