Abash

Abash :- Embarrass
a·bashed
a·bash·ing
a·bash·es
To make ashamed or uneasy; disconcert.
verb
To cause (a person) to be self-consciously distressed: chagrin, confound, confuse, discomfit, discomfort, disconcert, discountenance, embarrass, faze, mortify.

Idioms: put on the spot, throw for a loop.

adj
Definition: being ill at ease, mental discomfort.
IN BRIEF: To destroy the self-control or self-confidence of someone.
The dean was apt to abash Josh for his antics.