arsénieux
French, adjective/aʁ.se.njø/
arsénieux is spelled A-R-S-É-N-I-E-U-X (9 letters) and appears about once in every 76 million words in written French, the 273,192nd most frequent French word form (wordfreq, 2021 data). Arsénieux is a French adjective meaning “arsenious” (English Wiktionary, September 2026). The French Wiktionary (Wiktionnaire) defines it as “Qui est formé d’arsenic au degré d’oxydation III et d’une quantité d’oxygène inférieure à celle de l’acide…”.
What does arsénieux mean in English?
adjective
- 1
arsenious
Source: English Wiktionary, French section, dump of September 2, 2026 (CC BY-SA 4.0).
How French dictionaries define it
adjective: 1. Qui est formé d’arsenic au degré d’oxydation III et d’une quantité d’oxygène inférieure à celle de l’acide arsénique (H₃AsO₄).
The definition in the French Wiktionary (Wiktionnaire), in French.
Source: French Wiktionary (Wiktionnaire), dump of September 1, 2026 (CC BY-SA 4.0), through kaikki.org.
Forms of arsénieux
- arsénieuse feminine
- arsénieuses feminine plural
Source: English Wiktionary and French Wiktionary (Wiktionnaire) (dumps of September 2, 2026 and September 1, 2026).
How do you pronounce arsénieux?
- /aʁ.se.njø/
- \aʁ.se.njø\
Sources: English Wiktionary, French Wiktionary (Wiktionnaire) (dumps of September 2, 2026 and September 1, 2026); recordings from Wikimedia Commons.
How common is arsénieux in French?
arsénieux appears about once in every 76 million words in written French.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).