'undependable' definitions:

Definition of 'undependable'

From: WordNet
adjective
Not worthy of reliance or trust; "in the early 1950s computers were large and expensive and unreliable"; "an undependable assistant" [syn: unreliable, undependable] [ant: dependable, reliable]
adjective
Liable to be erroneous or misleading; "an undependable generalization" [syn: undependable, unreliable]