I. Act., thoughtless, inconsiderate (ante- and post - class.): “nunc demum scio, me fuisse excordem, caecum, incogitabilem,” Plaut. Mil. 2, 6, 63; Lact. 1, 8.—
II. Pass., inconceivable, incomprehensible (post-class.): “immensitas efficientiae,” Mart. Cap. 9, § 922: “dementia,” Amm. 15, 3: incogitabile est, eandem esse causam, etc., Fragm. Jur. Civ. p. 23 Mai.