We found one dictionary that defines the word dreadily:

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1. dreadily: Wiktionary

Definitions from Wiktionary (dreadily) ▸ adverb:  In a dready manner; in dread. ▸ Words similar to dreadily ▸ Usage examples for dreadily ▸ Idioms related to dreadily ▸ Wikipedia articles (New!) ▸ Words that often appear near dreadily ▸ Rhymes of dreadily ▸ Invented words related to dreadily