IPA: /pəˈstɪəriər/
KK: /pəˈstɪr.i.ər/
Referring to something that is located at the back or rear, or something that comes after in order or time.
The posterior part of the plant is where the leaves grow.
The back part of the body, especially the buttocks.
He fell and landed on his posterior, which hurt a lot.
Posterior → It is formed from "post-" (meaning after) and "-erior" (a comparative suffix indicating more). The word "posterior" refers to something that is situated at the back or comes after something else.
Think of 'post-' meaning 'after' — so 'posterior' refers to something that is at the back or comes after.