undependable

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},
           {undependable}] [ant: {dependable}, {reliable}]
    2: liable to be erroneous or misleading; "an undependable
       generalization" [syn: {undependable}, {unreliable}]
    

109 Moby Thesaurus words for "undependable":
      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