IPA: /ɡrəˈtuːɪtəs/
KK: /grəˈtuːɪtəs/
Something that is given or done without any payment or reason; often unnecessary or unwarranted.
The movie was criticized for its gratuitous violence.
Gratuitous → It is formed from "gratus" (meaning pleasing or thankful) and the suffix "-ous" (meaning full of). The word "gratuitous" originally referred to something that is pleasing or given freely, without charge.
Think of something that is 'pleasing' ('gratus') and 'full of' ('-ous') — that's why gratuitous means something given freely or without charge.