IPA: /ˈrɔɪəli/
KK: /ˈrɔɪəli/
In a way that is grand or related to royalty; excessively or thoroughly.
She was treated royally at the banquet, receiving the best food and service.
Royally → It is formed from "royal" (from Old French *reial*, meaning regal or pertaining to a king) and "-ly" (meaning in a manner of). The word "royally" means in a manner befitting a king or queen.
Think of something being done in a 'regal' way — 'royal' relates to kings, and '-ly' indicates the manner. So, 'royally' means to do something in a kingly manner.