to feel or act shy or embarrassed; to show embarrassment (for example by blushing or averting one's eyes).
子供は知らない人に会うとすぐ恥ずかしがる。
Children get shy as soon as they meet someone they don't know.
彼女は褒められると恥ずかしがって目をそらした。
She looked away, embarrassed when she was praised.
面接で必要以上に恥ずかしがると、自分の良さを伝えにくい。
If you act overly shy in an interview, it's hard to convey your strengths.