adverb
royally
adverb
1
In a manner fit for royalty; grandly.
"They were royally entertained at the state banquet."
2
(informal) Thoroughly or extremely — often used for something bad.
"He royally messed up the presentation."
"We got royally ripped off at that hotel."
How to Use Royally
Learner’s notesIn plain EnglishGrandly, like royalty — or, informally, "completely" (usually about something going wrong).
When to use it
The intensifier sense ("royally screwed up") is informal and often used humorously.
Word Forms
more royally comparative, most royally superlative
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Etymology
Simply "royal" plus the adverb ending "-ly."