When you sadly accept something that's disagreeable, you're resigned. You might give a resigned sigh as you wait in the cold for a bus that's late again.
Being resigned means you've given up or surrendered to an unpleasant reality and the fact that you can't change it. While some kids cry when the babysitter tells them it's bedtime, others are resigned to brushing their teeth and putting on their pajamas. And though most people who live in cold climates are resigned to the frigid winter weather, there are always a few who escape to tropical beaches instead.