immobilitas
From LSJ
immōbĭlĭtas: (inm-), ātis, f. immobilis,
I immovableness (post-class.).
I Lit.: aquae (maris mortui), Just. 36, 3.—Absol., Tert. adv. Hermog. 36 fin.; Cael. Aur. Acut. 2, 37, 195.—Plur., Arn. 1, 26.—
II Trop., unfeelingness, want of feeling: animi, Lact. 6, 17, 23.