The Collaborative International Dictionary
Blightingly
Blightingly \Blight"ing*ly\, adv. So as to cause blight.
Wiktionary
blightingly
adv. In a blighting manner.
Usage examples of "blightingly".
Only Charles and Sophy remained unmoved, Sophy not raising her eyes from the sewing she was engaged on, and Charles saying blightingly, “A stupid and an impertinent remark, Gertrude.