Unable to think of anything to say, often due to surprise or shock.

न बोल पाने की अवस्था, अक्सर आश्चर्य या सदमे के कारण।

English Usage: She was so astonished by his proposal that she was lost for words.

Hindi Usage: वह उसके प्रस्ताव से इतनी चकित हो गई कि वह अवाक रह गई।