to be so surprised that you cannot speak
इतना हैरान होना कि आप कुछ भी नहीं कह सकते (itna hairan hona ki aap kuch bhi nahi keh sakte)
"I was lost for words when I won the prize."
"जब मैंने पुरस्कार जीता, तो मैं इतना हैरान था कि कुछ नहीं कह सका।" (jab maine puraskaar jeeta, to main itna hairaan tha ki kuch nahi keh saka)
to stay informed or at the same level as something or someon...
a little stupid or crazy
the beginning of a new idea or thought
to watch or monitor something or someone carefully
to release someone from blame or punishment
the most vulnerable or insecure part of a system