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

His host woke to the sight of five empty wine bottles and some form of smoking apparatus, which looked mysteriously like a homemade bong. — Jay Glennie, HollywoodReporter, 10 Nov. 2026

But when passengers begin mysteriously disappearing, the voyage descends into a terrifying fight for survival. — Melanie Goodfellow, Deadline, 9 Nov. 2026

Tossing loose chargers and electronics into random pockets of your personal item is a recipe for misplacing them—and for having a mysteriously bulky and heavy bag. — Sophie Dodd, Travel + Leisure, 5 Nov. 2026

Funny how all that happened thanks to one monster mysteriously showing up in town, isn’t it? — Maggie Fremont, Vulture, 4 Nov. 2026

Word History

First Known Use

15th century, in the meaning defined above

Rhymes for mysteriously

• deliriously
• imperiously
• seriously