Arduenna

From Proto-Celtic *ardwos, via Gaulish *arduo-.

Arduenna f sg (genitive Arduennae); first declension

1. Ardennes (forest and mountainous region in France, Belgium, Germany and Luxembourg)
2. Ardennes (a department of Grand Est, France, (INSEE code 08))
   • c. 52 BCE, Julius Caesar, Commentarii de Bello Gallico 5.3:

     At Indutiomarus equitatum peditatumque cogere, eisque qui per aetatem in armis esse non poterant in silvam Arduennam abditis, quae ingenti magnitudine per medios fines Treverorum a flumine Rheno ad initium Remorum pertinet, bellum parare instituit.

     But Indutiomarus began to collect cavalry and infantry, and make preparations for war, having concealed those who by reason of their age could not be under arms, in the forest Arduenna, which is of immense size, and extends from the Rhine across the country of the Treveri to the frontiers of the Remi.

First-declension noun, with locative, singular only.

• "Arduenna", in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press