The Hebrew adverb yachad means together, altogether, united, or alike. It occurs over 90 times in the Old Testament and conveys the idea of oneness, unity, and togetherness. The word emphasizes the joining or gathering of persons or things into a unified whole.
Yachad expresses the biblical ideal of communal unity before God. In Psalm 133:1, dwelling together in unity is declared good and pleasant — a vision of covenant community. The word appears in worship contexts where Israel gathers as one body before the LORD, and in prophetic visions of restored harmony. It reflects the deep biblical conviction that God's people are called not to isolated faith but to shared life, mutual care, and corporate worship.