chhùi-that-chi̍h喙窒舌

to be at a loss for words

to be at a loss for words; to lack eloquence; to be simple and slow in speech(of a person)

English Wiktionary, “喙窒舌” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E5%96%99%E7%AA%92%E8%88%8C · confidence: Medium (Wiktionary)