IPA: /ˌhɒspɪtəlaɪˈzeɪʃən/
KK: /hɑːspɪtəlaɪˈzeɪʃən/
The process of admitting someone to a hospital for medical care.
Her hospitalization was necessary after the accident.
Hospitalization → It is formed from "hospes" (meaning host or guest) and "-ization" (a suffix indicating the process of making or becoming). The word refers to the process of making someone a guest in a hospital for treatment.
Think of 'hospes' which relates to being a guest, and remember that 'hospitalization' means the process of becoming a guest in a hospital for care.