盍
コウ, おお.う, なんぞ

come together, congregate, meet, cover

JLPT0 G13 S0 F5000

Originally, the element at top# was not 去 but rather that described in 抑 (now written as 卬, but originally 印 in reverse → hold down). The addition of 皿 dish/plate/bowl suggests the idea of pressing a *cover* down upon a container → *meet* (← meeting of cover and container). *Why* is a borrowed meaning.

[Full Kanji Etymology List]