IPA: /ɪˈluːmɪnəbl/
KK: /ɪˈluːmɪnəbl/
Able to be made bright or lighted up, or something that can be easily understood.
The room was designed to be illuminable, allowing natural light to fill the space.
Illuminable → It is formed from "illuminare" (meaning to light up or make bright) and the suffix "-able" (meaning capable of). The word "illuminable" means capable of being lit up or made bright.
Think of something that can be 'lit up' ('illuminare') — that's why 'illuminable' means it can be illuminated.