The kanji 菜さい primarily means "vegetables," "greens," or "edible plants." It represents any plant grown for food.

・On-yomi (音読み): サイ ・Kun-yomi (訓読み): な

⚫︎ 野菜 Translation: Vegetables ⚫︎ 白菜 Translation: Chinese cabbage ⚫︎ 菜食主義 Translation: Vegetarianism

The kanji 菜さい is a phono-semantic compound (形声文字). The left side, 艹 (くさかんむり - "grass radical"), indicates that the character is related to plants or vegetation. The right side, 采, is a phonetic component, representing the sound "sai" and also implying the process of picking or harvesting. Therefore, the character conveys the idea of harvesting plants, specifically for food. Over time, it came to be used more broadly to refer to vegetables or edible greens.