Antonyms of immobility :
Examples of usage:
All the anguish, suffering, strife of the past days; the humiliation and anger of his downfall; all that was an infamous nightmare, a thing born in sleep to be forgotten and leave no trace- and true life was this: this dreamy immobility with his head against her heart that beat so steadily. "An Outcast of the Islands", Joseph Conrad.
Harcutt was struck at once with the singular immobility of his face. "Mysterious Mr. Sabin", E. Phillips Oppenheim.
The features were stilled in the awful immobility of death: but for that immobility, the dead man lying there before them might have been asleep. "The End of Her Honeymoon", Marie Belloc Lowndes.