1 adverbs to describe how to nonplused

Momentarily nonplussed by such unheard-of calmness under a ghostly visitation, the apparition, without changing position, allowed itself to roll one inquiring eye towards the opening above the step-ladder, where the moonlight revealed an attentive head of red hair.

1 adverbs to describe how to  nonplused  - Adverbs for  nonplused