This is the 10132nd most frequent French word.
honteux
Ashamed or shameful.
In this sentence, 'honteux' is used as an adjective to describe the person's behavior as disgraceful or embarrassing due to its unacceptability.
Son comportement durant la réunion était honteux.
His behavior during the meeting was shameful.
Here 'honteuse' (feminine form of 'honteux') is used as a mental state adjective to express feeling of personal shame or regret for one's actions.
Elle se sentait honteuse après avoir oublié le rendez-vous important.
She felt ashamed after forgetting the important meeting.
In this context, 'honteuse' critiques a decision as damaging to one's reputation or dignity, reflecting societal or formal judgment.