Lewis & Short

ăsymbŏlus (ăsum-, Fleck.), a, um, adj., = ἀσύμβολος, that contributes nothing to an entertainment, scot-free (in pure Lat., immunis, Hor. C. 4, 12, 23): Tene asumbolum venire unctum atque lautum e balneis, Ter. Phorm. 2, 2, 25; cf. Gell. 6, 13 (opp.: sumbolam dare, Ter. And. 1, 1, 61).