顏厚有忸怩

even the most brazen person will sometimes feel shame (idiom)

surname Yan

color / face / countenance

brazen

thick / deep or profound / kind / generous / rich or strong in flavor / to favor / to stress

to have; there is / (bound form) having; with; -ful; -ed; -al (as in 有意[you3 yi4] intentional)

accustomed to / blush / be shy

bashful / blushing

shy / timid / bashful / to look ashamed