Definition of unreliable in English:

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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



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.



For editors and proofreaders

Syllabification: un·re·li·a·ble

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