motion sickness
US /ˈmoʊ.ʃən ˌsɪk.nəs/
UK /ˈmoʊ.ʃən ˌsɪk.nəs/

1.
a feeling of nausea and dizziness caused by motion, typically in a vehicle or on a boat
:
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She always gets motion sickness on long car rides.
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Taking medication can help prevent motion sickness.