stŭpĭdĭtas, ātis, f. [stupidus],
senselessness , dullness , stupidity (very rare), Att. ap. Non. 226, 22 (Trag. Rel. v. 287 Rib.): incredibilis, * Cic. Phil. 2, 32, 80.
stupiditās ātis, f stupidus, senselessness, dulness, stupidity : hominis. ...
An Elementary Latin Dictionary