Adverb
waspishly (comparative more waspishly, superlative most waspishly)
In a waspish manner.
Don't let him upset you," Niko told the four softly. "He's old and he's frightened." "You're as old as him, and you aren't scared of us," Briar pointed out. Niko glared at him. "Thank you so much," he retorted waspishly. Tamora Pierce