The Hebrew conjunction o (אוֹ) expresses alternatives or options. It is one of the most common logical connectors in the Old Testament legal and wisdom literature, functioning like the English 'or' and indicating choice or alternative conditions.
While o is a grammatical connector, its theological weight emerges in contexts where God presents alternatives — life or death, blessing or curse. The great either/or structures of the Torah are built on this small word. Deuteronomy 30 is perhaps the most powerful: Moses sets before Israel the choice of life and blessing or death and cursing. God's covenant always presents humanity with real choices with real consequences.