Thesaurus

(n) : the point that stands backward in an arrow, fishhook, etc., to prevent it from being easily extracted. Hence: Anything which stands out with a sharp point obliquely or crosswise to something else; a beard, or that which resembles it, or grows in the place of it

(v) : to furnish with barbs, or with that which will hold or hurt like barbs, as an arrow, fishhook, spear, etc; (Armor) (Corrupt) To cover a horse in armor, corrupted from bard