Synonyms of undependable

Adjective

1. unreliable (vs. reliable), undependable (vs. dependable), erratic, temperamental, uncertain, unsound, untrustworthy#1, untrusty

usage: not worthy of reliance or trust; "in the early 1950s computers were large and expensive and unreliable"; "an undependable assistant"

2. undependable, unreliable, fallible (vs. infallible)

usage: liable to be erroneous or misleading; "an undependable generalization"