The Hebrew verb yasad means to found, establish, fix, or lay a foundation. It occurs approximately 42 times in the Old Testament and is used both literally (laying the foundation of a building) and figuratively (God establishing the earth, founding Zion, or establishing His purposes).
Yasad speaks to God's sovereign, deliberate creative and redemptive acts. God founded the earth (Psalm 104:5), laid the foundation of Zion (Isaiah 28:16), and established His eternal purposes. The messianic "cornerstone" prophecy in Isaiah 28:16 uses this verb, declaring that God lays in Zion a tested, precious cornerstone — a sure foundation. This word underscores the stability, permanence, and intentionality of everything God builds.