IPA: /vəˈluːmɪnəsnəs/
KK: /vəˈluːmɪnəsnəs/
The quality or state of being large in size or volume.
The voluminousness of the clouds indicated a heavy rain was coming.
Voluminousness → It is formed from "volumen" (from Latin, meaning roll or scroll) and the suffix "-ous" (meaning full of) combined with "-ness" (meaning the state of being). The word "voluminousness" refers to the state of being full of volume or bulk.
Think of 'volumen' as a roll or scroll that is full of content, and remember that 'voluminousness' describes the state of being full of volume.