IPA: //ˈpɜːrsənəlaɪz//
KK: /ˈpɜrnəˌsəɪz/
To make something suitable for a particular individual by adding personal touches or modifications.
She decided to personalise her phone case with her favorite photos.
Past: personalised
Past Participle: personalised
Personalise → It is formed from "person" (from Latin "persona", meaning a character or individual) and "-alise" (a suffix used to form verbs meaning to make or to become). The word "personalise" means to make something personal or to tailor it to an individual.
Think of 'persona' which means a character or individual, and remember that to 'personalise' something is to make it specific to that individual.