From ambigō ("wander; waver, hesitate") Adjective: ambiguus

1. going two ways, hither and thither, moving from side-to-side
2. hybrid
3. changing, fluctuating, wavering
4. uncertain, doubtful, undecided, indecisive
5. of discourse - obscure, ambiguous
6. figuratively - wavering, not to be relied on, untrustworthy, unreliable, treacherous