D defs.my
Entry 1 sense Webster, 1913

Unreliable

/ŭnˌ-rĭl-ī'-əb-əl/ · Un·re·li·a·ble · IPA /ˌʌn.ɹəˈlaɪ.ə.bəl/
01 a. Not reliable; untrustworthy. See Reliable.
  1. 1.
    Not reliable; untrustworthy. See Reliable. See: Reliable
    “Alcibiades . . . was too unsteady, and (according to Mr. Coleridge's coinage) “unreliable;” or perhaps, in more correct English, too “unrelyuponable.”” De Quincey.