The noun 食物 (shíwù) means "food" in a general sense. It combines 食 (to eat) and 物 (thing/object) to refer to any edible substance. It is a formal term compared to the more colloquial 吃的, and is common in written Chinese, science, and health contexts.
冰箱里的食物快吃完了,得去超市买点。
bīngxiāng lǐ de shíwù kuài chī wánle, děi qù chāoshì mǎi diǎn.
The food in the fridge is almost gone; we need to go to the supermarket to buy some.
医生说这些食物对身体有好处。
yīshēng shuō zhèxiē shíwù duì shēntǐ yǒu hǎochù.
The doctor said these foods are good for the body.
天气热的时候,食物容易变质。
tiānqì rè de shíhou, shíwù róngyì biànzhì.
When the weather is hot, food spoils easily.