Origin of monstrous
Related formsmon·strous·ly, adverbmon·strous·ness, noun
Examples from the Web for monstrously
The back story here is that reporting on the details of competing budget proposals is monstrously boring.
Mrs. McAdam writes me that she received your letter, and really begins to imagine herself a 'monstrously agreeable woman.'Memoir of Mary L. Ware, Wife of Henry Ware, Jr.|Edward B. Hall
The dinner was good, as usual; in Elizabeth's eyes, monstrously good.Lady Merton, Colonist|Mrs. Humphry Ward
It was one of those hard daubs that are nevertheless so monstrously like the originals.