jointure (n.)

late 14c., "act or fact of being joined," from Old French jointure "a putting together," from Latin iunctura "a joining, juncture," from iunctus, past participle of iungere "to join together," from nasalized form of PIE root *yeug- "to join." Specific legal sense is from mid-15c.: "estate or property settled on an intended husband and wife, meant as a provision for the latter."