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

While dealing with an impending counterattack from Oda, Murashige finds that trouble stirs in his own courts as mysterious deaths, from a child prisoner to other officials, end up mysteriously murdered. — Zachary Lee, IndieWire, 27 July 2026

Horvát’s English-language debut stars Mackenzie Davis and Rupert Friend in the story of a young scientist who mysteriously disappears only to show up weeks later at her own memorial service with no memory of what happened. — Scott Roxborough, HollywoodReporter, 22 July 2026

Oscar Pareja, the most successful coach in franchise history, unexpectedly and mysteriously exited after only three matches. — Mike Bianchi, The Orlando Sentinel, 17 July 2026

Pína and Hawk mysteriously slip out while Joe and Angela are in the kitchen, suggesting that the adventurous lovemakers may have just been figments of their imagination. — Patrick Ryan, USA Today, 11 July 2026

Word History

First Known Use

15th century, in the meaning defined above

Rhymes for mysteriously

• deliriously
• imperiously
• seriously