spume

Etymology

From Middle English spume, from Old French espume, from Latin spūma.

noun

1. Foam or froth of liquid, particularly that of seawater.
   No sluggish tide congenial to the glooms; / This, as it frothed by, might have been a bath / For the fiend's glowing hoof - to see the wrath / Of its black eddy bespate with flakes and spumes. 1855, Robert Browning, Childe Roland to the Dark Tower Came, section XIX
   The desert storm was riding in its strength; the travellers lay beneath the mastery of the fell simoom.[…]Roaring, leaping, pouncing, the tempest raged about the wanderers, drowning and blotting out their forms with sandy spume. 1892, James Yoxall, chapter 5, in The Lonely Pyramid
   A strong sea wind lashed at his city suit, salt rain stung his eyes, balls of spume skimmed across his path. 1986, John le Carré, A Perfect Spy

verb

1. To froth.