1) Fixed 2) Frozen 3) French word used in English 4) Going nowhere 5) Immotile 6) Immovable 7) Immoveable 8) Motionless 9) Nonmotile 10) Nonmoving 11) Not mobile or moving 12) Number-one single in Italy 13) Pop ballad 14) Securely fixed in place 15) Stabile 16) Static 17) Stationary 18) Stiff 19) Still here Found on https://www.crosswordclues.com/clue/immobile
Im·mo'bile adjective [ Latin immobilis : confer French immobile . See Immobility .] Incapable of being moved; immovable; fixed; stable. Prof. Shedd. Found on http://www.encyclo.co.uk/webster/I/14