ardu
French, adjective/aʁ.dy/
ardu is spelled A-R-D-U (4 letters) and appears about once in every 1 million words in written French, the 34,908th most frequent French word form (wordfreq, 2021 data). Ardu is a French adjective meaning “steep (of a near-vertical gradient)” (English Wiktionary, September 2026). The French Wiktionary (Wiktionnaire) defines it as “D’accès difficile”.
What does ardu mean in English?
adjective
- 1
steep (of a near-vertical gradient)
- 2
arduous, needing or using up much energy, difficult
Source: English Wiktionary, French section, dump of September 2, 2026 (CC BY-SA 4.0).
How French dictionaries define it
adjective: 1. D’accès difficile. 2. Qualifie des idées qu'il est difficile d’atteindre ou des questions qu’il est difficile de résoudre.
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 ardu
- ardue feminine
- ardus masculine plural
- ardues feminine plural
Source: English Wiktionary and French Wiktionary (Wiktionnaire) (dumps of September 2, 2026 and September 1, 2026).
How do you pronounce ardu?
- /aʁ.dy/
- \aʁ.dy\
Sources: English Wiktionary, French Wiktionary (Wiktionnaire) (dumps of September 2, 2026 and September 1, 2026); recordings from Wikimedia Commons.
English words that translate to ardu
Source: the translation tables of the English Wiktionary, dump of September 2, 2026.
How common is ardu in French?
ardu appears about once in every 1 million words in written French.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).