C2 showing that you feel sorry about having caused someone problems or unhappiness表示歉意的;抱歉的;道歉的
She was so apologetic about forgetting my birthday it was almost embarrassing.她因忘记我的生日而深感歉疚,这倒让我有些不好意思了。
I hope he was suitably apologetic for breaking your glasses.他打碎了你的眼镜,我希望他适当地道过歉了。