1. to have an excessively high opinion of oneself; to be arrogant or presumptuous
Usage: formal or literary; often used with 'oneself'

Examples

• He tends to overween about his accomplishments.
• She overweened herself into believing she could win without studying.
• The candidate overweened, thinking victory was guaranteed.
• Don't overween your abilities; preparation is still essential.
• They overweened in their confidence and failed the test.
• He overweened so much that his peers began to resent him.