con·join 
(kən-join)
(kən-join)tr. & intr.v. con·joined, con·join·ing, con·joins
To join or become joined together; unite.
[Middle English conjoinen, from Old French conjoindre, conjoign-, from Latin coniungere : con-, com- + iungere, to join; see yeug- in the Appendix of Indo-European roots.]
con·joiner n.