1. to make (someone) feel embarrassed, confused, or ashamed; to disconcert
Usage: past tense and past participle of 'discountenance'; formal or literary
2. to refuse to approve of or support; to discourage or disapprove
Usage: past tense and past participle of 'discountenance'; formal or archaic

Examples

• She was discountenanced by the unexpected criticism during her presentation.
• The teacher's stern look discountenanced the misbehaving students.
• His rude behavior discountenanced everyone at the dinner party.
• The principal discountenanced any form of cheating in the school.
• She felt discountenanced when her proposal was rejected without explanation.
• The committee discountenanced the controversial plan from the start.