horrendus

Future passive participle of horreō (“dread, be afraid of”).

• (Classical Latin) IPA^(key): [hɔrˈrɛn.dʊs]
• (modern Italianate Ecclesiastical) IPA^(key): [orˈrɛn̪.d̪us]

horrendus (feminine horrenda, neuter horrendum); first/second-declension adjective

1. horrible, horrendous, horrific, horrid, dreadful, dreaded, frightful, awful
   • 29 BCE – 19 BCE, Virgil, Aeneid 4.180–183:

     [...] pedibus celerem et pernīcibus ālīs:
     mōnstrum horrendum, ingēns, cui quot sunt corpore plūmae
     tot vigilēs oculī subter, mīrābile dictū,
     tot linguae, totidem ōra sonant, tot subrigit aurēs.

     [Rumor is] fleet-footed and swift-winged: a horrific monster, huge, who has for the feathers on her body as many watchful eyes underneath, [and] – incredible to relate – just as many tongues, sounding lips, and straining ears.
     (Fama or Rumor personified as an incredible monster.)

First/second-declension adjective.

• “horrendus”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers