1. bound or reinforced with iron
2. rigid or inflexible in rules or principles
3. rocky and rugged, especially of a coastline

Examples

• The old chest was ironbound with metal strips for extra strength.
• The ship’s ironbound hull could withstand rough seas.
• He followed ironbound rules that never changed.
• The committee maintained an ironbound policy on attendance.
• The ironbound coast was treacherous for sailors.
• Waves crashed against the ironbound cliffs.
• The ironbound shoreline stretched for miles.