To feel ashamed — to feel shame about one's actions or condition, often from a sense of responsibility or conscience.
自分の無責任さを恥じて、謝罪の手紙を書いた。
Feeling ashamed of his irresponsibility, he wrote a letter of apology.
彼は過ちを恥じて、表に出てこなくなった。
He was ashamed of his mistake and stopped showing his face in public.
自分の短所を恥じる必要はないよ。誰にでも弱点はある。
There's no need to be ashamed of your shortcomings. Everyone has weaknesses.