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Not easily relied or depended on: an undependable worker; an undependable lamp socket.

un′de·pend′a·bil′i·ty n.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.undependability - the trait of not being dependable or reliableundependability - the trait of not being dependable or reliable
irresponsibility, irresponsibleness - a form of untrustworthiness; the trait of lacking a sense of responsibility and not feeling accountable for your actions
instability - unreliability attributable to being unstable
irreproducibility - the quality of being unreproducible; "he could not explain the irreproducibility of the results of his experiment"
fallibility - the likelihood of making errors
dependability, dependableness, reliability, reliableness - the quality of being dependable or reliable
References in periodicals archive ?
But the problem with lickspittles is their darned undependability. Men or women who are subservient out of self-interest will turn against the prince when their interests change, or when they get a plea deal.
Therefore, by applying Markov assumption of undependability on prediction of the current state observation to the past observation if the current state of the system is given, the belief will be simplified as
The terms on the right side of this diagram can, in fact, involve negative features like fickleness, fragility, or undependability. Monopolar metaphysicians thus commendably avoid these negative features, but they pay a price for their style of avoidance.
Cleckley identified 16 personality features that he deemed to be characteristic of psychopathy: (1) superficial charm, intelligence, and adjustment; (2) absence of psychosis; (3) low levels of neuroticism; (4) irresponsibility and undependability; (5) deceit; (6) lack of remorse and shame; (7) recurrent immoral and criminal behavior; (8) poor judgment and difficulty learning from experience; (9) egocentricity and incapacity for love; (10) poverty of affect; (11) poor insight; (12) lack of reciprocity in interpersonal relationships; (13) impulsivity and disinhibition, often heightened by substance use; (14) relative immunity from suicide; (15) superficial and impulsive sexual encounters; and (16) an aimless or shiftless existence.
The unreliability Asorin shows as a narrator is thus linked with the undependability he shows as a husband.
Continued political uncertainty around the agreement and the system's undependability has led Questa to withdraw from a Joint Powers Agreement (JPA) for emergency communications services.