Lewis & Short

ambĭgŭĭtas, ātis, f. [ambiguus], equivocalness, double sense, ambiguity, uncertainty: sed nobis ambiguitas nominis, Cic. Inv. 1, 40: verbi, Liv. 41, 18: in ambiguitatem incidere, Sen. Ep. 9; so Quint. 5, 10, 106; 6, 3, 47; 7, 9, 3: omne quod (vir) loquitur, sine ambiguitate venit, cometh to pass without uncertainty, surely, * Vulg. 1 Reg. 9, 6 al.
In plur.: relictis ambiguitatibus, Sen. Ep. 108; Quint. 1, 10, 5.