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

Sources report to Entertainment Weekly that CBS — the network responsible for this glaring lack of security — launched a full-scale investigation into the matter… only to see the data from that investigation mysteriously wiped from their servers. — Dalton Ross, Entertainment Weekly, 6 July 2026

The play tells the story of the English Roanoke Colony, an entire colony on Roanoke Island that mysteriously vanished in 1587. — Tara Massouleh McCay, Southern Living, 4 July 2026

More than 11 years after an 18-year-old North Carolina woman mysteriously disappeared on her way to work, authorities say the case has finally cracked open. — Stepheny Price, FOXNews.com, 30 June 2026

The results have often left me highly frustrated, but also have given me indescribable joy at the fact of having absorbed (although only partially, of course) some of the elusive beauty of those marvelous, magical, mysteriously alluring tongues. — Douglas Hofstadter, Time, 30 June 2026

Word History

First Known Use

15th century, in the meaning defined above

Rhymes for mysteriously

• deliriously
• imperiously
• seriously