The Chinese word for spinach is
菠菜

bō cài

Chinese Definition

Components
菠
1. (zh-used2, c)
菜
1. vegetable; greens
蔬菜 - vegetables -
白菜 - Chinese cabbage -
菠菜 - spinach -
2. (specifically, in compounds) rape; rapeseed (plant used for vegetable oil)
3. 菜籽 - rapeseed -
4. 菜油 - rapeseed oil -
5. dish; course
這道菜很對胃口。 - This dish is tasty.
每次他來這兒r，他都點同樣的菜。 - Whenever he comes to this place, he orders the same dish.
我在考慮我晚飯做什麼菜。 - I'm wondering what to cook for dinner.
6. cuisine; (type of) food
川菜 - Sichuan cuisine -
日本菜 - Japanese food -
7. grocery
買菜 - to buy groceries -
菜市場 - farmers' market -
8. (colloquial) (one's) type; cup of tea
他是我的菜！ - He is my type!
9. (colloquial) bad; inferior; disappointing; below average
菜鳥 - noob -
我好菜啊。 - I'm so inferior to others.
菜英文 - poor English (pun on the name of Taiwanese president Tsai Ing-wen)
10. (Hong Kong Cantonese, slang) girlfriend
Cai; Tsai