Cry = 哭 [Kū]
Onions usually make people cry, but this one is bawling itself, mouth wide open, tears pouring down both sides. That is 哭.
哭 (kū) means “to cry.” The two 口 on top can look like two crying eyes. The opposite is 笑 (xiào), to laugh.
To cry hard is 大哭 (dà kū).
别哭了。 — Bié kū le. — Stop crying.
切洋葱的时候，我总是哭。 — Qiē yángcōng de shíhou, wǒ zǒngshì kū. — I always cry when I cut onions.