mysteriously

American  

[mi-steer-ee-uhs-lee] / ˌmɪˈstɪər i əs li /

adverb

1. in a mysterious way.

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Explanation

If something occurs in a strange or eerie way, you can say it happens mysteriously. Your little brother might mysteriously disappear every time the dog needs to be walked, for example. When something can't be easily explained, it happens mysteriously. Some people say that boats mysteriously disappear in a region of the Atlantic Ocean known as the Bermuda Triangle, and others tell stories of sick people being mysteriously healed by prayer. At the heart of mysteriously is the noun mystery, which had only a religious meaning until the late fourteenth century, and which is rooted in the the Greek word mysterion, "secret rite or doctrine."

Example Sentences

"With aging, problems mysteriously emerge at many levels -- at the mechanistic, cellular, and organ level -- but one commonality is that all those processes are mediated by proteins," Frydman said.

From Science Daily • May 29, 2026

One of the sadnesses of the expedition was that Lewis failed to publish his account, and his descriptions, of more than 200 plant specimens, mysteriously went missing after his death.

From The Wall Street Journal • Apr. 16, 2026

The Rolling Stones have mysteriously released a new limited edition single on vinyl only, under the band name The Cockroaches, further fueling speculation the British rockers are poised to drop a 25th studio album.

From Barron's • Apr. 13, 2026

In 2014, the duo brought to the screen the epic story of Claire Randall, a British combat nurse who is mysteriously transported back to 1743 Scotland and marries Scottish warrior Jamie Fraser to survive.

From Los Angeles Times • Mar. 6, 2026

At their earliest sessions, Pickie’s spirit was silent, but the Fox sisters’ rapping spirits mysteriously and successfully answered at least some of the Greeley’s inquiries about the afterlife.

From "American Spirits" by Barb Rosenstock