interjoin

To interconnect two sets.

To join mutually; to unite.

[…] so, fellest foes, Whose passions and whose plots have broke their sleep, To take the one the other, by some chance, Some trick not worth an egg, shall grow dear friends And interjoin their issues.

[…] it is most probable to be the Port of Trapezonment, plac’d in a Corner of the Euxine Sea; for from this Port, within a few Months, Anno 1272. they came to Ancona, which could not be perform’d from the Caspian Sea, by reason of the great space of Land and Regions interjoin’d.

To say by way of interruption, to interject.

“No, no,” cried lady Anna, in trepidation, “leave him—let him go.” Lennard unloosed his hold for a moment; and regarding her ladyship with a look of jealous anger, he stood irresolute. “Leave him,” interjoined Wentworth. “He has abused the privileges of a social meeting, by venting the preconcerted acumen of a malicious nature; he is beneath your contempt.”

“Oh! you can have no idea of its gaiety,” returned Frances; “and such a quantity of people.” “A number of persons, and a quantity of goods,” interjoined Miss Colville.