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
Europa	-	Greek Mythology (Latinized)
Severi	SE-ve-ree	Finnish
Cirila	-	Slovene
Gail	GAYL	English
Mathis	MAH-tis (German)	German, French
Mitxel	-	Basque