alone

I prefer to study alone in a quiet room.

(Chinese) 我更喜欢独自在安静的房间里学习。

The old man lived alone in a small cabin.

(Chinese) 老人独自住在一间小木屋里。

The rent alone costs half of my monthly salary.

(Chinese) 单单房租就花掉了我月薪的一半。

Man cannot live by bread alone.

(Chinese) 人不能仅靠面包生活。