本尊

1. • yidam (one's chosen meditational deity)

     Buddhism

2. • the principal object of worship on a Buddhist altar
3. • (of a monk who has the ability to appear in multiple places at the same time) the honored one himself (contrasted with his alternate forms, 分身 fēnshēn)
4. • (jocular) the genuine article

     fig.

5. • the real McCoy
6. • the man himself
7. • the woman herself
8. • the original manifestation of sth (not a spin-off or a clone)

Character by character

• 本(běn)root
• 尊(zūn)senior