寂寞

I'm very lonely on the weekend.

The old man is very lonely after being widowed.

He often felt very lonely.

Even if she is alone all day, she does not feel lonely.

One of the old man's sons and daughters is abroad and lives a lonely life after retirement.

At night, I was alone at home, and I felt a little lonely.

Single life, the biggest problem is too lonely.

If you want to achieve something academically, you must be able to endure loneliness.