Aislin, narrowed hazel eyes and immobile pink lips, flipped on the light of the stairway and stared at me.
The exhibit points out, for instance, that immobile plants face over 500,000 types of insects who want to feed on them.
mid-14c., from Old French immoble "immovable, fixed, motionless," from Latin immobilis "immovable" (also, figuratively, "hard-hearted"), from assimilated form of in- "not, opposite of" (see in- (1)) + mobilis (see mobile (adj.)). Hence, immobilism "policy of extreme conservatism" (1949, from French immobilisme).
immobile im·mo·bile (ĭ-mō'bəl, -bēl', -bīl')
Not moving; motionless.