bewildered

perplexed by many conflicting situations or statements; filled with bewilderment; "obviously bemused by his questions"; "bewildered and confused"; "a cloudy and confounded philosopher"; "just a mixed-up kid"; "she felt lost on the first day of school

सुनन्दा की चिट्ठी पढकर सुकान्त हक्का बक्का रह गया।

Sukanta was bewildered by this letter.