孤单 (gūdān) — lonely; alone

Characters in this word

Strokes: 8
Radical: 子 — son, child
Made of: 子 son, child 瓜 melon, gourd, squash, cucumber
How it's built: Phono-semantic — one part hints at the meaning, another at the sound

在陌生的城市里，他并不缺少朋友，却常常感到一种说不清的孤单。 Zài mòshēng de chéngshì lǐ, tā bìng bù quēshǎo péngyou, què chángcháng gǎndào yì zhǒng shuō bu qīng de gūdān. In an unfamiliar city, he did not lack friends, yet he often felt an indescribable loneliness.
孩子们都去上学了，奶奶一个人在家，觉得有点孤单。 Háizimen dōu qù shàngxué le, nǎinai yí ge rén zài jiā, juéde yǒudiǎn gūdān. The kids have all gone to school, and Grandma is home alone, feeling a bit lonely.
一个人在国外过节，难免会觉得孤单。 Yí ge rén zài guówài guò jié, nánmiǎn huì juéde gūdān. Spending a holiday alone abroad, you can't help feeling lonely.