IPA: /ˈlævɪʃnəs/
KK: /ˈlævɪʃnəs/
The quality of being extravagant or showing great wealth and luxury.
The lavishness of the wedding surprised all the guests with its opulence and grandeur.
Lavishness → It is formed from "lavish" (from Middle English *lavissh*, meaning profuse or extravagant) and the suffix "-ness" (meaning the state or quality of). The word "lavishness" refers to the quality of being extravagant or excessively generous.
Think of the word 'lavish' which means extravagant, and remember that 'lavishness' describes the state of being extravagant.