What is the meaning of Oga?

A chief, employer, or superior.

eye

bow

boss, master, senior

eye

horror or terror

eye

bathe, immerse

thorn, prickle

spine (a strong and sharp thorn-like covering, bone or similar formation)

spike, barb

boss, someone in charge

berry (small fruits of various species)

to wash oneself, to bathe

Source: wiktionary.org