aequus

• aiquos, aequos (Republican spelling)
• aecus (phonetic spelling)

From earlier aiquos (SCdB), for Proto-Italic *aikʷos or *aikwos, of unknown origin.^[1][2] Cf. however the Italic tribe Aequī, Aequīcolī (+ colere), and the placenames Aequum Tūticum (Samnium Hirpinum), Aequum Faliscum and Aequī Faliscī (Etruria), Superaequum (Samnium Paelignum), in some of which the noun aequum (“plain”), in others perhaps the adjective "razed" can be seen.^[3][4] Probably not related to Sanskrit ऐक्य (aikya, “concord, identity, sameness”).

• (Classical Latin) IPA^(key): /ˈae̯.kʷus/, [ˈäe̯kʊs̠]
• (modern Italianate Ecclesiastical) IPA^(key): /ˈe.kwus/, [ˈɛːkwus]

aequus (feminine aequa, neuter aequum, comparative aequior, superlative aequissimus, adverb aequē or aequiter); first/second-declension adjective

1. equal

   Synonyms: aequālis, adaequātus, pār, compār

   Antonyms: dispār, inaequālis, impār, inīquus

   • 8 CE, Ovid, Fasti 3.878:

     tempora nocturnīs aequa diurna ferēs

     you will receive daytimes with equal nights
     (The March equinox, also known as the vernal or spring equinox.)

2. level, even, flat, horizontal

   Synonym: plānus

   Antonyms: impār, inīquus

3. calm
4. (figuratively) fair, impartial, equitable, just, favorable
   • 29 BCE – 19 BCE, Virgil, Aeneid 4.520–521:

     [...] tum, sī quod nōn aequō foedere amantīs
     cūrae nūmen habet iūstumque memorque, precātur.

     Then, if [there is] a heavenly power, righteous and mindful, which has concern for lovers in unjust union, [Dido] prays [for intervention].
     (Whereas Dido believed that she had joined Aeneas in marriage, he later denied any such commitment. Translations in context – Mackail, 1885: “lovers ill allied”; Knight, 1956: “lovers whose love is not matched well”; Mandelbaum, 1971: “those who love without requital”; Fitzgerald, 1981: “lovers bound unequally by love”; West, 1990: “lovers who have been betrayed”; Lombardo, 2005: “lovers who love on unequal terms”; Fagles, 2006: “lovers bound by unequal passion”; Ahl, 2007: “all lovers with one-sided contracts”; Ferry, 2017: “unfortunate lovers”; Bartsch, 2020: “unrequited love”; Ruden, 2021: “a broken bond of love”.)

First/second-declension adjective.

• → English: equ-
• → Italian: equo
• → Portuguese: équo

• “aequus”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• “aequus”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• Félix Gaffiot (1934) “aequus”, in Dictionnaire illustré latin-français [Illustrated Latin-French Dictionary] (in French), Hachette.
• Carl Meißner, Henry William Auden (1894) Latin Phrase-Book‎^[2], London: Macmillan and Co.
  • (ambiguous) friend and foe: aequi iniqui
    
  • (ambiguous) to endure a thing with (the greatest) sang-froid: aequo (aequissimo) animo ferre aliquid
    
  • (ambiguous) justly and equitably: ex aequo et bono (Caecin. 23. 65)
    
  • (ambiguous) a sound judicial system: aequa iuris descriptio (Off. 2. 4. 15)
    
  • (ambiguous) to live with some one on an equal footing: aequo iure vivere cum aliquo
    
  • (ambiguous) in a favourable position: idoneo, aequo, suo (opp. iniquo) loco