IPA: /ˈɡlɔːriəsnəs/
KK: /ˈɡlɔːrɪəsnəs/
The quality of being magnificent, splendid, or worthy of admiration.
The gloriousness of the sunset took everyone's breath away.
Gloriousness → It is formed from "glorious" (from Latin *gloriosus*, meaning full of glory) and the suffix "-ness" (meaning the state or quality of). The word "gloriousness" refers to the state of being full of glory or having great beauty and splendor.
Think of 'glorious' meaning full of glory, and remember that 'gloriousness' describes the state of having that glory.