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

By the early 2000s, detectives were diving into cold cases, but the trace evidence from the Rasmussen slaying had mysteriously vanished from the coroner’s office. —Christopher Goffard, Los Angeles Times, 15 May 2025

This nostalgic feature film is set in 1996 and focuses on a small town teenage girl named Denise, whose father mysteriously vanished one night years ago while investigating a flying saucer sighting in the nearby forested hills. —Jeff Spry, Space.com, 9 May 2025

The film centers on Gerda, who sets off into the great unknown in search of her friend Kai, who has mysteriously vanished. —Leo Barraclough, Variety, 7 May 2025

In the midst of the chaos, Clara mysteriously shows up and finds her family at Favalli's home. —Caroline Blair, People.com, 6 May 2025

Word History

First Known Use

15th century, in the meaning defined above

Rhymes for mysteriously

• deliriously
• imperiously
• seriously