1. to flood with water; to cover completely with water
2. to overwhelm with a large amount of something

Examples

• Heavy rains inundated the coastal towns.
• The river burst its banks and inundated the farmland.
• The office was inundated with phone calls after the announcement.
• She felt inundated by all the homework assignments.
• The celebrity was inundated with interview requests.
• The tsunami inundated several villages along the coast.
• Customer service was inundated with complaints about the new policy.