Where the shape comes from
A lid over a bowl of grain: the pointed top is the cover being lifted, and what sits beneath it is a footed vessel of cooked food. Reduced to 饣 on the left, it marks eating and everything served: 饭, 饺, 馆, 饿.
汉字 filed under 食
No published character on HSK Guide is filed under this radical yet. 汉字库.