undependable
- a not worthy of reliance or trust
an undependable assistant - s liable to be erroneous or misleading
an undependable generalization
- Calls the Arizonan "undependable" in Congress and usually "allied with the Democrats.
- Condon acts as mother hen to as undependable a brood of gifted musicians as James Petrillo has in his roster.
- A new Premier is overly dependent on undependable allies.