IPA: //ˈɡræn.di.oʊs//
KK: /ˈɡrændiˌoʊs/
Having an impressive or extravagant quality, often in a way that seems exaggerated or showy.
The grandiose plans for the new building included a massive atrium and a rooftop garden.
Comparative: more grandiose
Superlative: most grandiose
Grandiose → It is formed from "grand" (from Latin "grandis", meaning large or great) and "-ose" (meaning full of or possessing). The word "grandiose" describes something that is full of grandeur or impressively large in appearance or style.
Think of something that is 'large' ('grand') and 'full of' ('-ose') impressive qualities — that's why grandiose means impressively large or extravagant.