石 + Noun (compound) / Standalone
The noun 石 (shí) means "stone" or "rock." It can appear on its own in literary or concise contexts, or as part of compound words like 石头 (shítou). In more formal or written Chinese, 石 alone is commonly used to refer to rocks or stones.
河边有很多光滑的石头。
hé biān yǒu hěn duō guānghuá de shítou.
There are many smooth stones by the river.
他捡起一块石头扔进了湖里。
tā jiǎn qǐ yī kuài shítou rēng jìn le hú lǐ.
He picked up a stone and threw it into the lake.
这座桥是用石头建造的,非常坚固。
zhè zuò qiáo shì yòng shítou jiànzào de, fēicháng jiāngù.
This bridge is built with stone and is very sturdy.