A person who cannot be trusted to take on responsibility is an example of someone who would be described as feckless.
- weak; ineffective
- careless; irresponsible
Origin of fecklessScottish ; from feck (aphetic for effect) + -less
- Careless and irresponsible: “political prestidigitation designed to distract public attention from his feckless flouting of basic ethical principles” (Doug Ireland).
- Feeble or ineffective: “Pickering's life was routinely threatened, and one feckless attempt had already been made to kidnap or kill him” (Garry Wills).
Origin of fecklessScots feck, effect (alteration of effect) + –less.
(comparative more feckless, superlative most feckless)