डर से चुप।

प्रियंका साँप को देखते ही सन्न हो गई।
अचेष्ट, जड़, निश्चेष्ट, संज्ञारहित, संज्ञाशून्य, संज्ञाहीन, संवेदनारहित, संवेदनाशून्य, संवेदनाहीन, सन्न

In a state of mental numbness especially as resulting from shock.

He had a dazed expression on his face.
Lay semiconscious, stunned (or stupefied) by the blow.
Was stupid from fatigue.
dazed, stunned, stupefied, stupid