hibernum

• (Classical Latin) IPA^(key): [hiːˈbɛr.nũː]
• (modern Italianate Ecclesiastical) IPA^(key): [iˈbɛr.num]

Ellipsis of hībernum tempus (“winter-time”).^[1] Came to replace hiems (“winter”) in the development from Latin to Romance.

• hybernum (Medieval Latin)

hībernum n (genitive hībernī); second declension (Late Latin)

1. winter

   Synonym: hiems

Second-declension noun (neuter).

Descendants with an added nasal in the first syllable, perhaps via parallelism with īnfernus (“hell”):

• Walther von Wartburg (1928–2002) “hībĕrnus”, in Französisches Etymologisches Wörterbuch, volume 4: G H I, page 421

• hibernum in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.
• Carl Meißner, Henry William Auden (1894) Latin Phrase-Book‎^[1], London: Macmillan and Co.
  • (ambiguous) in spring, summer, autumn, winter time: verno, aestivo, auctumnali, hiberno tempore
    
  • (ambiguous) winter-quarters, summer-quarters: castra hiberna, aestiva
    
  • (ambiguous) to take the troops to their winter-quarters: milites in hibernis collocare, in hiberna deducere
    

hībernum

1. inflection of hībernus:
   1. nominative/accusative/vocative neuter singular
   2. accusative masculine singular