1. one who pledges or promises something, especially in a formal or solemn manner
Usage: archaic

Examples

• The plighter of troth stood before the altar with unwavering resolve.
• As a plighter of his word, he never broke a promise.
• The medieval plighter bound himself to serve his lord faithfully.
• She was known as a reliable plighter of charitable donations.
• The plighter's oath echoed through the ancient hall.