undependable adj

1 not worthy of reliance or trust; "in the early 1950s computers were large and expensive and unreliable"; "an undependable assistant" [syn: unreliable] [ant: reliable, reliable]

2 not to be trusted [syn: unreliable]

3 liable to be erroneous or misleading; "an undependable generalization" [syn: unreliable]

English

Adjective

1. The opposite of dependable

Usage notes

More undependable would often be expressed as less dependable and most undependable would often be least dependable.

Antonyms

• dependable

Synonyms

• unreliable

adrift, afloat, alternating, amorphous, capricious, changeable, changeful, coquettish, dangerous, desultory, deviable, dizzy, doubtful, dubious, eccentric, erratic, faddish, fast and loose, fickle, fitful, flickering, flighty, flirtatious, flitting, fluctuating, fly-by-night, freakish, giddy, hazardous, impetuous, impulsive, inconsistent, inconstant, indecisive, infirm, insecure, insubstantial, irregular, irresolute, irresponsible, light, mazy, mercurial, moody, perilous, precarious, provisional, quicksilver, rambling, restless, risky, rocky, roving, scatterbrained, shaky, shapeless, shifting, shifty, shuffling, skittish, slippery, spasmodic, spineless, temporary, tentative, ticklish, tottery, toying, treacherous, tricky, trustless, unaccountable, uncertain, uncontrolled, undisciplined, unfaithworthy, unfixed, unhealthy, unpredictable, unreliable, unrestrained, unsafe, unsettled, unsolid, unsound, unstable, unstable as water, unstaid, unsteadfast, unsteady, unsubstantial, unsure, untrustworthy, untrusty, vacillating, vagrant, variable, versatile, vicissitudinary, vicissitudinous, volatile, wandering, wanton, wavering, wavery, wavy, wayward, whimsical, wishy-washy