lig-

(Latin: tie, bind)

unreliable
1. Lacking a sense of responsibility.
2. Not worthy of reliance or trust.
3. Dangerously unstable and unpredictable.
4. Not to be trusted.
5. Liable to be erroneous or misleading.
unreliably
1. In an unfaithful, undependable, or unreliable manner.
2. Characterized by not being reliable or not to be relied or depended on.