羞於啟齒

to be too shy to speak one's mind (idiom)

shy / ashamed / shame / bashful / variant of 饈|馐[xiu1] / delicacies

surname Yu / Taiwan pr. [Yu2]

(literary) Oh! / Ah!

(of time or place) in; at; on / (indicating any indirect relation) to; toward; vis-à-vis; with regard to; for / (indicating a source) from; out of / (used in comparison) than / (used in the passive voice) by

Qi son of Yu the Great 禹[Yu3], reported founder of the Xia Dynasty 夏朝[Xia4 Chao2] (c. 2070-c. 1600 BC)

to open / to start / to initiate / to enlighten or awaken / to state / to inform

to open one's mouth / to start talking

tooth / CL:顆|颗[ke1]