IPA: /ˈhɒspɪtəlaɪz/
KK: /ˈhɑspɪtəlˌaɪz/
To admit someone to a hospital for medical treatment.
The doctor decided to hospitalise the patient for further observation.
Past: hospitalised
Past Participle: hospitalised
Hospitalise → It is formed from "hospes" (meaning host or guest) and the suffix "-al" (meaning relating to) combined with "-ise" (a verb-forming suffix). The word refers to the act of providing care or treatment in a place that serves as a host for patients.
Think of a 'host' ('hospes') providing care to 'guests' in a place dedicated to healing — that's what hospitalise means.
No commonly confused words.