abashes
adj.adj. to make someone feel suddenly embarrassed, ashamed, or shy. It is a formal word for when you lose your confidence because of what someone says or does.
adj. to cause someone to feel embarrassed, disconcerted, or ashamed. Transitive; often used in the passive voice or as a participial adjective ('abashed').
The teacher's sharp criticism abashes the quiet student.
The sudden silence in the room abashes him, making him regret his loud joke.
Nothing abashes the young orator more than a well-timed rebuttal from a senior colleague, which effectively strips away his carefully constructed confidence.
The verb is transitive and requires a direct object. In modern usage, it is significantly more common in its past participle form 'abashed' than in the present tense.