The Hebrew word aqqo (H689) appears in Deuteronomy 14:5 as one of the clean animals listed for the Israelites. It refers to a species of wild mountain deer or ibex, prized for its agility on rocky heights.
The dietary laws in Deuteronomy illustrate God's careful ordering of creation and His people's life. The ibex/roe, dwelling in high places and navigating difficult terrain with sureness, became a metaphor in Hebrew poetry for spiritual swiftness and trust in God (Psalm 18:33). The clean/unclean distinction reminded Israel of holiness — set-apart living — in every area of life including food.