stately heavy-bodied aquatic bird with very long neck and usually white plumage as adult
source: WordNet 3.0
Any one of numerous species of large aquatic birds belonging to Cygnus, Olor, and allied genera of the subfamily Cygninæ. They have a large and strong beak and a long neck, and are noted for their graceful movements when swimming. Most of the northern species are white. In literature the swan was fabled to sing a melodious song, especially at the time of its death.
source: Webster 1913
verb
to declare or affirm solemnly and formally as true
Before God I swear I am innocent.
source: WordNet 3.0
move about aimlessly or without any destination, often in search of food or employment
The gypsies roamed the woods. Roving vagabonds. The wandering Jew. The cattle roam across the prairie. The laborers drift from one town to the next. They rolled from town to town.