The word garol refers to a rough, uncut stone — and by natural extension, to a stone or pebble used in casting lots. The casting of lots (goralot) was a standard means of discerning God's will in Israel, used for tribal land allocation, priestly assignments, and identifying the guilty.
The casting of lots (goralot, a related term) was theologically grounded in Proverbs 16:33: 'The lot is cast into the lap, but its every decision is from the LORD.' This conviction made lot-casting a form of seeking divine guidance rather than mere chance. The Urim and Thummim may have functioned as lots. Most dramatically, the lot fell on Jonah (Jonah 1:7), on Achan (Joshua 7), and divided the Promised Land among the twelve tribes (Numbers 26:55). The soldiers casting lots for Jesus's garments (Psalm 22:18; Matthew 27:35) uses this language ironically — human randomness fulfilling sovereign prophecy.