unreliable

[ uhn-ri-lahy-uh-buhl ]
See synonyms for unreliable on Thesaurus.com
adjective
  1. not reliable; not to be relied or depended on.

Origin of unreliable

1
First recorded in 1830–40; un-1 + reliable

Other words for unreliable

Other words from unreliable

  • un·re·li·a·bil·i·ty, un·re·li·a·ble·ness, noun
  • un·re·li·a·bly, adverb

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use unreliable in a sentence

British Dictionary definitions for unreliable

unreliable

/ (ˌʌnrɪˈlaɪəbəl) /


adjective
  1. not reliable; untrustworthy: an unreliable witness

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012