Extended Strong's Greek Lexicon (Abbott-Smith based)
to unite
Usage: συν-κεράννυμι (Rec. συγκ-), [in LXX: Dan LXX 2:43 (עֲרַב ithpa.), 2Ma.15:39 * ;] to mix or blend together, compound: with accusative, 1Co.12:24; ptcp. pf. pass., Heb.4:2, T, WH, mg., R, mg.; id., of persons, with dative instr., to be united with, agree with, ib., WH, txt., R, txt. (see Westc., in l).† (AS)