bosom

1. (intransitive) To belly; to billow, swell or bulge.Examples: "Just above the recess the cliff bosomed out with a full swell for some two or three feet, effectually preventing any one’s looking down into the nest from above […]"; "1905, Alex Macdonald, In Search of El Dorado, London: T. Fisher Unwin, Part II, “The Five-Mile Rush,” p. 92, What Stewart called a “langtailie coat” spread out behind him like streamers in a breeze, a “biled” collar had, in the same gentleman’s terse language, “burst its moorings” and projected in two miniature wings at the back of his ears, and a shirt that had once been white, bosomed out expansively through an open vest."intransitive

2. (transitive) To belly; to cause to billow, swell or bulge.Examples: "1822, James Hogg, The Three Perils of Man, London: Longman, Hurst, Rees, Orme & Brown, Volume 3, Chapter 12, pp. 440-441, I looked again, and though I was sensible it must be a delusion brought on by the stroke of his powerful rod, yet I did see the appearance of a glorious fleet of ships coming bounding along the surface of the firmament of air, while every mainsail was bosomed out like the side of a Highland mountain."; "1855, The Scald [pseudonym of George Smellie], “Sketches of a Voyage to Hudson’s Bay” in The Sea: Sketches of a Voyage to Hudson’s Bay, and Other Poems, London: Hope & Co., p. 45, Thus one by one they mount, and spreading wide, The transverse wings extend on either side, And, lightly bosomed by the gentle gale, She seems a moving pyramid of ail."transitive