IPA: /ɪˈmoʊbɪlɪti/
KK: /ɪˈmoʊbɪlɪti/
The state of being unable to move or being very still.
After the accident, he experienced a period of immobility that made it difficult for him to walk.
Immobility is formed from "in-" (meaning not) and "mobilis" (from Latin, meaning movable or capable of movement) and the suffix "-ity" (meaning the state or condition of). The word describes the state of being not movable or unable to move.
Think of 'not' ('in-') and 'movable' ('mobilis') to remember that 'immobility' means the state of being unable to move.