挂念 (guà niàn): to feel anxious about; to have (sth) weighing on one's mind

Mom is very anxious about her son studying abroad.

Although we haven't seen each other for a long time, I have always been thinking about my old friends.

Grandpa is ill in the hospital, and the whole family is worried about his health.

After leaving his hometown, he often misses his parents at home.

Working in another city, I often worry about the elderly at home.

My friend has gone far away, and I constantly feel concerned, not knowing if she is doing well.