lost for words

unable to think of something to say at a loss for words Chris was lost for words at Kathy's incredible rudeness.

Usage notes: usually said because something has surprised you

Name	Pronounced	Usage
Houda	-	Arabic
Marceli	mahr-TSE-lee	Polish
Sirius	SIR-ee-əs (English), SEER-ee-əs (English)	Astronomy
Antoinette	awn-twaw-NET	French
Sukie	SOO-kee	English
Deshaun	-	African American