vallis
vallis is a Latin form of valles, meaning “valley”. It is the accusative plural feminine noun or genitive singular feminine noun or nominative singular feminine noun.
Found 45 times in the Latin texts on Socratos.
Where it is used
Caesar, De Bello Gallico 5.32.2: et cum se maior pars agminis in magnam convallem demisisset, ex utraque parte eius vallis subito se ostenderunt novissimosque premere et primos prohibere ascensu atque iniquissimo nostris loco proelium committere coeperunt.
Ovid, Metamorphoses 3.155: Vallis erat piceis et acuta densa cupressu,
Livy, Ab urbe condita 21.37.5: inferiora uallis apricos quosdam colles habent riuosque prope siluas et iam humano cultu digniora loca.
All forms of valles (declension table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.