join: Of the New Testament words, kollao, literally, "glue," "weld together," and its compounds, designate the closest form of personal union, as in Lu 15:15; 1Co 6:16; Eph 5:31. In the words of institution of marriage, suzeugnumi is used (Mt 19:6; Mr 10:9, literally, "yoke together"; compare Ge 2:24).