"united, connected, associated," late 14c., from Middle French conjoint, past participle of conjoindre "to meet, come together" (12c.), from Latin coniungere "to join together," from assimilated form of com "with, together" (see con-) + iungere "to join together" (from nasalized form of PIE root *yeug- "to join." Related: Conjointly (early 14c.).
