mysterium
mys·te·ri·um/mɪˈstɪɹiəm/noun
mysterium is spelled M-Y-S-T-E-R-I-U-M: 9 letters and 4 syllables (mys·te·ri·um). It appears about once in every 13 million words in written English, the 106,501st most frequent word form (wordfreq, 2021 data). As a noun, mysterium means “Any of various unknown elements thought to make up existing forms of matter, or a substance seen as an elemental or pure form of something else” (English Wiktionary, September 2026). The plural of mysterium is mysteria.
How many letters and syllables are in mysterium?
| Letters | 9: M-Y-S-T-E-R-I-U-M |
|---|---|
| Syllables | 4: mys·te·ri·um |
| In writing | about once in every 13 million words; the 106,501st most frequent word form |
| Wrong spellings searched | none measured in search |
| Rhymes with |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media); rhymes and same-letter words are computed by PlainSpell from its own word list.
How common is mysterium?
Mysterium appears about once in every 13 million words in written English, the 106,501st most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How do you pronounce mysterium?
- UK /mɪˈstɪəɹɪəm/
- US /mɪˈstɪɹiəm/
Mysterium has 4 syllables, split mys·te·ri·um in writing.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What rhymes with mysterium?
5 words on PlainSpell end in the same sounds as mysterium from its last stressed vowel (/ɪɹiəm/):
Computed by PlainSpell from the pronunciations in the English Wiktionary (dump of September 2, 2026): a rhyme shares every sound from the last stressed vowel to the end; ordered by written frequency (wordfreq 3.1).
Forms of mysterium
- mysteria plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does mysterium mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
Any of various unknown elements thought to make up existing forms of matter, or a substance seen as an elemental or pure form of something else.
- 2
The hypothetical source of a galactic radio emission at 1665 megahertz (later identified as due to hydroxyl radicals in interstellar space).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Where does mysterium come from?
Borrowed from Latin mystērium. Doublet of mystery.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).