say it: uhn-ri-LAHY-uh-buhl
unreliable is an adjective meaning "liable to be erroneous or misleading". It carries 4 recorded senses.
liable to be erroneous or misleading
“an undependable generalization”
not worthy of reliance or trust
“in the early 1950s computers were large and expensive and unreliable”
“an undependable assistant”
dangerously unstable and unpredictable
“treacherous winding roads”
“an unreliable trestle”
lacking a sense of responsibility
Definitions, synonyms and semantic relations for unreliable come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.