Definitions

mysterious

[mi-steer-ee-uhs] / mɪˈstɪər i əs /

ADJECTIVE

obscure, puzzing, suggesting a mystery

Synonyms

STRONGEST

baffling cryptic curious dark enigmatic inexplicable inscrutable magical mystical mystifying obscure perplexing puzzling secretive strange unknown weird

WEAK

abstruse alchemistic arcane astrological cabalistic covert difficult eldritch enigmatical equivocal esoteric furtive hidden impenetrable incomprehensible insoluble necromantic occult oracular recondite sphinxlike spiritual subjective symbolic transcendental uncanny unfathomable unknowable unnatural veiled

Antonyms

STRONGEST

apparent bright clear comprehendible comprehensible evident familiar intelligible known normal obvious plain regular usual visible

WEAK

public straightforward tangible unmysterious

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The Vertigo has always been mysterious to me.

From Los Angeles Times • Apr. 17, 2026

Roo's mysterious case was also being reviewed by teams at Glasgow's Royal Hospital for Children and it was a chance phone call with one endocrinologist there that provided the missing piece of the puzzle.

From BBC • Apr. 16, 2026

At first glance, sea sponges seem almost too simple to be mysterious.

From Science Daily • Apr. 15, 2026

Finally, the hosts delve into the New York Times’ quest to uncover the mysterious creator of Bitcoin, the pseudonymous Satoshi Nakamoto, and argue over the investigation’s conclusion.

From Slate • Apr. 11, 2026

The mysterious shapes faded behind the airship and were replaced by more dark depths.

From "The Wild Robot Escapes" by Peter Brown

Vocabulary lists containing mysterious

Purple Hibiscus

Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!

It's All a Blur: Synonyms for "Unclear"

Interested in learning more words like this one? Our team at Vocabulary.com has got you covered! You can review flashcards, quiz yourself, practice spelling, and more – and it's all completely free to use!

Schooled

Want to remember this word for good? Start your learning journey today with our library of interactive, themed word lists built by the experts at Vocabulary.com – we'll help you make the most of your study time!