Elle a reçu hier après-midi une lettre mystérieuse sans adresse de retour.
English: She received a mysterious letter without any return address yesterday afternoon.
mystérieux /misteʁjˈø/ · adjective · CEFR B2. French translation of "mysterious".
See also: Vocabulary entry (French)
- Source term
- mysterious
- Translation
- mystérieux
- CEFR Level
- B2
- Part of speech
- adjective
- Image
Pronunciation audio — Open the full phoneme overview
Listen to how "mystérieux" sounds in French.
Article, Gender & Forms
This adjective is shown in its dictionary form.
| Dictionary form | mystérieux |
|---|---|
| Use note | Use the form shown here as the lookup form. |
How to use it in a sentence
- Pattern
- mystérieux + noun / It is mystérieux
- Examples
- C'est mystérieux.
- Tip
- Adjust endings and word order to match the full sentence.
Example Sentences
Il y a quelque chose de mystérieux dans la vieille maison au bout du chemin.
English: There is something mysterious about the old house at the end of the lane.
Il nous a raconté une histoire mystérieuse que nous voulions tous examiner de plus près.
English: He told us a mysterious story that we all wanted to investigate further.
Related vocabulary
Practice this in SmartWords
Move from lookup to repetition with guided vocabulary exercises, saved words, and CEFR-based lesson paths.
Keep exploring
Play SmartWords games
Six word games built around our real vocabulary — free in the browser, no install.
Open the game hub →-
Word Sling
Match the center word under time pressure and keep the combo alive.
Play now → -
Word Gate
Fly through the correct gate before the speed ramps up.
Play now → -
Word Ninja
Slice the goal-language words, avoid the main-language decoy, and chase the announced bonus target.
Play now → -
Word Zip
Trace a single path across the board, hit each letter anchor in order, and fill every open cell.
Play now → -
Word Oddity
Pick the word that doesn't belong from a topic-driven set — every tap reveals all four meanings and images so the round becomes a flash-card too.
Play now → -
Word Memory
Flip and match goal-language words to their main-language meaning before your lives run out.
Play now →