Sofia Cruz
Verb.
to rise or roll in waves or surges
to bulge or swell out (as through action of the wind)
Noun.
a great wave or surge of water
a rolling mass (as of flame or smoke) that resembles a high wave
(Merriam-Webster Dictionary)
IPA: ˈbi-lō
"...[A] woman the color of water, a ghost in the current, floating just above the sword. She had long billowing hair, and her eyes, barely visible, were green like mine." (Percy Jackson, p. 214)
"The curtains billowed in the breeze." (Collins Dictionary)
"Billows of smoke poured out of the burning building."(Britannica Dictionary)
Old Norse bylgja 'a wave, a billow'
Source: https://www.etymonline.com/word/billow
French: onduler
Spanish: ola
Korean: 부풀다
Mandarin Chinese: 巨浪
Polish: Bałwan
Arabic: انتفاخ
Swahili: kelele
Persian: باد کردن