IPA: /ˌʌnˈmoʊtɪˌveɪtɪd/
KK: /ʌnˈmoʊtɪˌveɪtɪd/
Not having the desire or willingness to do something; lacking motivation.
She felt unmotivated to study for her exams this week.
Unmotivated → It is formed from "un-" (meaning not) and "motivated" (from Latin "motivus", meaning moving or causing motion). The word "unmotivated" means not moved to act or lacking motivation.
Think of 'not' ('un-') being added to 'moved' ('motivated') — this helps you remember that unmotivated means lacking the drive to take action.