Masso (H4856) comes from nasa (to lift up) and specifically refers to the 'lifting up of the face' — showing partiality or favor. It is used in legal/judicial contexts (2 Chr 19:7, Job 13:8) to describe the unjust favoritism that corrupts justice. God Himself is described as one who shows no masso — He does not show partiality (Deut 10:17, 2 Chr 19:7).
The theology of impartiality is central to biblical justice. God shows no partiality: He does not favor the rich, the powerful, or the familiar (Job 34:19, Acts 10:34). His justice is perfectly calibrated to truth alone. This standard cascades down to human judges (Lev 19:15), to the church (James 2:1-9 — showing partiality is sin), and to the final judgment (Rom 2:11 — 'with God there is no partiality'). The elimination of masso is a defining characteristic of God's kingdom — a world where the poor and the powerful stand equally before the throne.