Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
cŭbĭto, āvi, 1, v. freq. n. [cubo], to lie down often, to be accustomed to lie down (rare): anus hic solet cubitare, Plaut. Curc. 1, 1, 76; Cic. Cael. 15, 36: humi (pavones), Col. 8, 11 fin.: super pedes cubitantis reclinis, Tac. A. 14, 5.
Of sexual intercourse: cum aliquā (aliquo), Plaut. Curc. 1, 1, 57; id. Stich. 4, 1, 41; Quint. 8, 3, 22.