IPA: //fɪkˈtɪʃəs//
KK: /fɪkˈtɪʃəs/
Not real or true; made up or invented, often to deceive or for storytelling purposes.
The author created a fictitious world for her novel.
Fictitious → It is formed from "fictus" (meaning made or formed) and the suffix "-ious" (meaning full of or characterized by). The word "fictitious" means characterized by being made up or not real, often referring to something invented or imagined.
Think of something that is 'made up' ('fictus') and remember that 'fictitious' describes things that are not real or are invented.