bond (n.)
early 13c., "anything that binds," phonetic variant of band (n.1). For vowel change, see long (adj.); also influenced by Old English bonda "householder," literally "dweller" (see bondage). Legalistic sense first recorded 1590s.
bond (v.)
1670s (transitive), from bond (n.). Intransitive sense from 1836. Originally of things; of persons by 1969. Related: Bonded; bonding. Male bonding attested by 1969.