From an unused root meaning to shut or close off. Itter literally means bound, shut up, or restricted in the right hand, and is used to describe individuals who were left-handed or ambidextrous. The term appears in Judges to describe select Benjaminite warriors — men who were left-handed or possibly ambidextrous slingers of exceptional skill.
The term itter reveals something fascinating about God's providential use of apparent limitations. In Judges 3:15, God raises up Ehud ben-Gera as a deliverer for Israel — and his being left-handed was the very thing that caught Eglon's guards off guard, as swords were typically worn on the left hip. God uses the restricted to liberate. This same pattern appears in Judges 20:16 where 700 left-handed Benjaminites could each sling a stone at a hair's breadth without missing. What appears to be limitation becomes lethal precision in God's hand. The theology here is one of divine irony and sovereign reversal — the shut hand becomes the open hand of deliverance.