BILLOWED
Verb
billowed
simple past tense and past participle of billow
Source: Wiktionary
BILLOW
Bil"low, n. Etym: [Cf. Icel. bylgja billow, Dan. bölge, Sw. bölja;
akin to MHG. bulge billow, bag, and to E. bulge. See Bulge.]
1. A great wave or surge of the sea or other water, caused usually by
violent wind.
Whom the winds waft where'er the billows roll. Cowper.
2. A great wave or flood of anything. Milton.
Bil"low, v. i. [imp. & p. p. Billowed; p. pr. & vb. n. Billowing.]
Definition: To surge; to rise and roll in waves or surges; to undulate.
"The billowing snow." Prior.
Source: Webster’s Unabridged Dictionary 1913 Edition