- fallible - likely to fail or be inaccurate; "everyone is fallible to some degree"
Antonyms: infallible, foolproof, unfailing, inerrable, inerrant, unerring
- fallible, frail, imperfect, weak - having the attributes of man as opposed to e.g. divine beings; "I'm only human"; "frail humanity"
Antonym: nonhuman (indirect, via human)