IPA: /ɪˈmoʊtaɪl/
KK: /ɪˈmoʊtaɪl/
Not able to move or lacking movement.
The immotile object remained in the same place throughout the experiment.
Immotile → It is formed from "in-" (meaning not) and "motile" (from Latin "motilis", meaning movable or capable of movement). The word "immotile" means not capable of movement or motionless.
Think of 'not' ('in-') being combined with 'movable' ('motile') to remember that 'immotile' describes something that cannot move.