mysterious

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mysterious

  • /mɪˈstɪə̯.ɹi.əs/ UK
  • /mɪˈstɪɹi.əs/ US
  • /məˈstɪɹi.əs/ US

Rhymes with -ɪəɹiəs

Where it comes from

From Middle English *misterius (implied in misteriusly), probably partly from Middle French mystérieux and partly from Latin mystērium + -ous. By surface analysis, mystery + -ous.

adjective more mysterious · most mysterious

  1. Of unknown origin. He received a mysterious phone call this morning.

    Similar: untraceable

  2. Having unknown qualities. Our boss is a mysterious man who hardly ever meets with us.

    Similar: esoteric, uncertain, undefined

  3. Difficult to understand. Why he left without saying goodbye is quite mysterious.

    Similar: abstruse, Chinese, dense, enigmatic, fathomless, bottomless, Greek, inapprehensible, incognizable, incomprehensible, ineffable, inenubilable

  4. Deliberately evasive or enigmatic. Stop being mysterious and just tell me what you want.

    Similar: abstruse, behind the scenes, catlike, backroom, backstairs, stealth, clandestine, cloak-and-dagger, concealed, confidential, covert, deep-laid

Similar: arcane, cryptic, enigmatic, ill-defined, inenubilable, mysterial, mysterioso, mysterious, mystic, runish, sibylline, systerious, uncertain, undefined, undetermined · Opposite: known, unambiguous, unmysterious, well-defined

Thesaurus

Closest in meaning: inscrutable, cryptical, cryptic, mystifying, incomprehensible, inexplicable, occult, secret, deep, esoteric, mystical, mystic, mystery, vagueness, vague, ambiguous

Translations

Every language

adj of unknown origin

Españolmisterioso
한국어신비(神秘)하다 sinbihada
日本語神秘的な shinpiteki na, ミステリアスな misuteriasu na, 不思議な fushigi na
中文神秘 shénmì, 來源不明的 /来源不明的 láiyuán bùmíng de
हिन्दीरहस्यपूर्ण rahasyapūrṇ, गूढ gūḍh
Kiswahilikidube
Portuguêsmisterioso
Françaismystérieux
Deutschmysteriös
Italianomisterioso, ignoto
Ελληνικάμυστήριος mystírios
Românămisterios
Русскийтаи́нственный taínstvennyj, зага́дочный zagádočnyj
Tiếng Việtthần bí
العربيةغَامِض ḡāmiḍ
עבריתמִסְתּוֹרִי

adj having unknown qualities

中文神秘 shénmì
Portuguêsmisterioso
Deutschrätselhaft
Русскийнеизве́стный neizvéstnyj

adj difficult to understand

中文難以理解的 /难以理解的 nányǐ lǐjiě de, 費解的 /费解的 fèijiě de, 晦澀的 /晦涩的 huìsè de
Portuguêsmisterioso
Русскийнепостижи́мый nepostižímyj, непоня́тный neponjátnyj

adj deliberately evasive or enigmatic

中文故弄玄虛的 /故弄玄虚的 gùnòngxuánxū de
Portuguêsmisterioso
Русскийзага́дочный zagádočnyj, таи́нственный taínstvennyj

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Cite this
MLA

"mysterious." Wiktionary, via Micwyn, micwyn.com/word/mysterious. Accessed 6 Nov. 2026.

APA

mysterious. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/mysterious

Chicago

"mysterious." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/mysterious.

BibTeX
@misc{mysterious_2026,
  title = {mysterious},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/mysterious},
  urldate = {2026-11-06}
}