I.inflexible, unchangeable, only in a trop. sense (postAug.).
I. In gen., of things: “virtus animum rectum et indeclinabilem praestat,” Sen. Ep. 66: “justitia,” id. ib. 74: “series re rum,” Gell. 6, 2.—Of persons: “judex,” Amm. 25, 4; id. 18, 1.—
II. In gram.: nomen, indeclinable, Diom. pp. 288, 289 P. — Hence, indēclīnābĭlĭter , adv., unchangeably, Aug. Civ. Dei, 9, 22 fin.