Synonyms for (adjective) unreliable

Synonyms: undependable, unreliable

Definition: not worthy of reliance or trust

Usage: in the early 1950s computers were large and expensive and unreliable; an undependable assistant

Similar words: temperamental, erratic

Definition: likely to perform unpredictably

Usage: erratic winds are the bane of a sailor; a temperamental motor; sometimes it would start and sometimes it wouldn't; that beautiful but temperamental instrument the flute- Osbert Lancaster


Similar words: uncertain

Definition: not consistent or dependable

Usage: an uncertain recollection of events; a gun with a rather uncertain trigger


Similar words: unsound

Definition: of e.g. advice


Synonyms: undependable, unreliable

Definition: liable to be erroneous or misleading

Usage: an undependable generalization

Similar words: fallible

Definition: likely to fail or make errors

Usage: everyone is fallible to some degree


Synonyms: unreliable

Definition: lacking a sense of responsibility

Similar words: irresponsible

Definition: showing lack of care for consequences

Usage: behaved like an irresponsible idiot; hasty and irresponsible action


Synonyms: treacherous, unreliable

Definition: dangerously unstable and unpredictable

Usage: treacherous winding roads; an unreliable trestle

Similar words: dangerous, unsafe

Definition: involving or causing danger or risk; liable to hurt or harm

Usage: a dangerous criminal; a dangerous bridge; unemployment reached dangerous proportions