吾
ゴ, われ, わが, あ, あ, あが
I, my, our, one's own
JLPT0 G13 S0 F1828
As per
五
# (cross) +
口
mouth → crossing of words in conversation. *I*, *my*, *our*, *one's own*, *oneself*, and *ego* are borrowed meanings.
[Full Kanji Etymology List]