IPA: /ɪˈmɔːtəlaɪz/
KK: /ɪˈmɔrtəˌlaɪz/
To make someone or something famous for a long time, or to give them a lasting memory.
The artist wanted to immortalise her friend in a beautiful painting.
Past: immortalised
Past Participle: immortalised
Immortalise → It is formed from "in-" (meaning not) and "mortal" (from Latin "mortalis", meaning subject to death) and the suffix "-ise" (meaning to make). The word "immortalise" means to make something not subject to death, or to make it eternal in memory.
Think of making something 'not mortal' ('in-' means not, and 'mortal' means subject to death) — that's why immortalise means to make something eternal.