To be befitting, proper, or becoming. A rare word that expresses the concept of appropriateness — what is fitting or suitable for a person's character or station. Used in contexts of proper adornment and fitting behavior.
Ya'ah speaks to the biblical principle that there is an order of appropriateness in God's creation. Certain things are 'becoming' to holiness (Psalm 93:5). Praise is 'fitting' for the upright (Psalm 33:1). This isn't mere aesthetics — it reflects the deeper truth that God's character defines what is truly beautiful and proper. What is fitting flows from who God is.