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