Definition: generally incompetent and ineffectual
Usage: feckless attempts to repair the plumbing; inept handling of the account
Similar words: incompetent
Definition: not qualified or suited for a purpose
Usage: an incompetent secret service; the filming was hopeless incompetent
Synonyms: feckless
Definition: not fit to assume responsibility
Similar words: irresponsible
Definition: showing lack of care for consequences
Usage: behaved like an irresponsible idiot; hasty and irresponsible action