undependable

Adj.	1.	undependable - not worthy of reliance or trust; "in the early 1950s computers were large and expensive and unreliable"; "an undependable assistant" Synonyms: unreliable Antonyms: dependable, reliable - worthy of reliance or trust; "a reliable source of information"; "a dependable worker"
	2.	undependable - not to be trusted Synonyms: unreliable
	3.	undependable - liable to be erroneous or misleading; "an undependable generalization" Synonyms: unreliable