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Uncertain, but perhaps from Proto-Indo-European *kseresnos, related to *kseros, whence perhaps also serēscō (become dry). See also Ancient Greek ξηρός (xērós), Sanskrit क्षार (kṣārá).[1]



serēnus (feminine serēna, neuter serēnum, adverb serēnē); first/second-declension adjective

  1. Clear, fair, bright, serene, tranquil.
  2. That clears the sky or brings fair weather.
  3. (figuratively) Cheerful, glad, joyous.


First/second-declension adjective.

Number Singular Plural
Case / Gender Masculine Feminine Neuter Masculine Feminine Neuter
Nominative serēnus serēna serēnum serēnī serēnae serēna
Genitive serēnī serēnae serēnī serēnōrum serēnārum serēnōrum
Dative serēnō serēnō serēnīs
Accusative serēnum serēnam serēnum serēnōs serēnās serēna
Ablative serēnō serēnā serēnō serēnīs
Vocative serēne serēna serēnum serēnī serēnae serēna

Derived terms[edit]



  • serenus”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • serenus”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • serenus in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette
  • serenus”, in Harry Thurston Peck, editor (1898) Harper's Dictionary of Classical Antiquities, New York: Harper & Brothers
  1. ^ The Oxford English Dictionary, 2nd ed., Clarendon Press, 1989.