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

The series stars Pearce Quigley as Manchester resident Michael Sleep, who is still adjusting to life without his partner, Clea, who mysteriously disappeared seven years earlier. — Jake Kanter, Deadline, 8 Sep. 2026

Archaeologists recently uncovered the remains of a medieval village that was mysteriously abandoned in Germany — raising questions about why its residents packed up and left. — Andrea Margolis, FOXNews.com, 6 Sep. 2026

It’s been over seven months since Nancy Guthrie mysteriously disappeared from her Arizona home. — Lizzie Lanuza, StyleCaster, 4 Sep. 2026

On the same day Krebs published his post, the service mysteriously vanished from the dark web, which could make tracking down the people behind the hack more difficult. — Victor Tangermann, Futurism, 3 Sep. 2026

Word History

First Known Use

15th century, in the meaning defined above

Rhymes for mysteriously

• deliriously
• imperiously
• seriously