deorsum

• deorsus, deosum (classical)
• jusum, dorsum, deiorsum, deiusum, zosum, zusum, iusum, jusum, iosum, josum, jusu, josu, juso (Late Latin, Medieval Latin)

From dē (“down”) +‎ vorsum, a variant of versum (“towards, -wards”), from the perfect passive participle of vortere, vertere (“to turn”).

• (Classical Latin)
  • (Conservative) IPA^(key): /deˈor.sum/, [d̪eˈɔrs̠ʊ̃ˑ]
  • (Analogical) IPA^(key): /deˈoː.sum/, [d̪eˈoːs̠ʊ̃ˑ]
  • (Colloquial) IPA^(key): /ˈi̯oː.sum/, [ˈi̯oːs̠ʊ̃ˑ]
  • (Greek speakers) IPA^(key): /ˈzoː.sum/, [ˈd̪͡z̪oːs̠ʊ̃ˑ]
• (Ecclesiastical) IPA^(key): /deˈor.sum/, [d̪eˈɔrsum]
• Note: the long /ō/ and the simplification of /rs/ are by analogy from prōsum; forms in /ū/ from sūsum.

deorsum (not comparable)

1. downwards
   • 405 CE, Jerome, Vulgate Matthaeus 4:6:

     Et dīxit ei, Si Fīlius Deī es, mitte tē deorsum. Scrīptum est enim: Quia angelīs suīs mandāvit dē tē, et in manibus tollent tē, nē forte offendās ad lapidem pedem tuum.

     And he [the devil] said to him, "If you are the Son of God, throw yourself downwards. For it is written that He has sent orders to his angels about you, and that they shall bear you in their hands lest you strike a stone with your foot."

2. below, beneath
   • 405 CE, Jerome, Vulgate Exodus 20:4:

     Non faciēs tibi sculptile, neque omnem similitūdinem quae est in caelō dēsuper, et quae in terrā deorsum, nec eōrum quae sunt in aquīs sub terrā.

     Thou shalt not make unto thee any graven image, or any likeness of any thing that is in heaven above, or that is in the earth beneath, or that is in the water under the earth.

• dēsuper
• sū(r)sum

• “deorsum”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• “deorsum”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• deorsum in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
• deorsum in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette