dŭbĭtābĭlis, e, adj. [dubito], doubtful (very rare).
I Pass. , to be doubted : verum, Ov. M. 1, 223: virtus, id. ib. 13, 21. —
II Act. , feeling doubt : pectus, Prud. Apoth. 649.
dubitābilis e, adj.dubito, doubtful, to be doubted : verum, O.: virtus, O. ...
An Elementary Latin Dictionary