結舌

tongue-tied / unable to speak (out of surprise, embarrassment etc)

(of a plant) to produce (fruit or seeds) / Taiwan pr. [jie2]

knot / sturdy / bond / to tie / to bind / to check out (of a hotel)

used in 喇舌[la3 ji1] to transcribe the Taiwanese word for "tongue"

tongue

stupefied / flabbergasted

agape and tongue-tied (idiom); at a loss for words / gaping and speechless