Definition of unreliable in English:


Syllabification: un·re·li·a·ble
Pronunciation: /ˌənrəˈlīəb(ə)l


Not able to be relied upon: he’s lazy and unreliable unreliable information
More example sentences
  • Research has shown, however, that recall is unreliable and rife with inaccuracies and biases.
  • What a pity that Ms Evans' information comes from such an unreliable source.
  • Such knowledge as management did possess was vague or unreliable and seldom committed to writing.
undependable, untrustworthy, irresponsible, fickle, fair-weather, capricious, erratic, unpredictable, inconstant, faithless, temperamental
informal hinky
questionable, open to doubt, doubtful, dubious, suspect, unsound, tenuous, uncertain, fallible;
risky, chancy, inaccurate
informal iffy, dicey



More example sentences
  • Percy Shelley was also an avowed atheist - and the Court of Chancery mostly relied on this, not on his infidelity or unreliability.
  • The overall unreliability of the study methodology contrasts with the brash confidence of the study report in asserting that the poor desire a sense of well-being over material wealth.
  • Compare that efficiency with the recent report that a Scottish businessman is so exasperated with the unreliability of the rail service to London that he has bought himself a private jet.


More example sentences
  • The average wind turbine produces less electricity in a year than the average family car: they produce high - cost electricity unreliably.
  • But another part of me likes having a backup network, one that I can reach, if unreliably, from across the street.
  • Miller is a first-rate intellectual but an unreliably quirky, quixotically overcerebral, hit-or-miss director.

Definition of unreliable in: