mysteriously

adverb

mys·​te·​ri·​ous·​ly mi-ˈstir-ē-əs-lē 

: in a mysterious manner : in a way that is difficult to explain or comprehend

documents that have mysteriously disappeared

smiling mysteriously

"I've got the key to my castle in the air, but whether I can unlock the door remains to be seen," observed Jo mysteriously.

—Louisa May Alcott

Examples of mysteriously in a Sentence

Recent Examples on the Web

But when a gutsy outsider puts herself in the running, and the other girls start mysteriously disappearing, the class of ’88 is suddenly in for one hell of a prom night. —Devonne Goode, Parents, 22 May 2025

Her brilliant, but neurodivergent mother, once the love of Glenn’s life, has mysteriously disappeared, leaving only a bag full of artwork about her childhood hero, Captain Tsunami, and cryptic instructions to bring it all to Glenn if anything should ever happen. —Matthew Carey, Deadline, 22 May 2025

The high-karat gold piece featured a mysteriously inky ammolite. —Chantel Tattoli, New York Times, 20 May 2025

Likely during the third or second century B.C.E., the relief was mysteriously broken and buried in a pit behind the niche, per the statement. —Sonja Anderson, Smithsonian Magazine, 15 May 2025

Word History

First Known Use

15th century, in the meaning defined above

Rhymes for mysteriously

• deliriously
• imperiously
• seriously