1. past tense and past participle of undergird; to strengthen or support from beneath or from the foundation
Usage: formal
2. to provide a basis or foundation for something abstract
Usage: formal

Examples

• The old bridge was undergirded with steel beams for safety.
• Her argument was undergirded by extensive research.
• The foundation was undergirded with concrete pillars.
• His confidence was undergirded by years of experience.
• The theory is undergirded by solid evidence.
• The building’s structure was undergirded after the earthquake.