LATIN DICTIONARYLexicon Latīnum
adjectivethird-declension one-termination adjective (non-i-stem)

congrex

congrex (genitive congregis)
Classical[ˈkɔŋ.ɡrɛks]Ecclesiastical[ˈkɔŋ.ɡreks]

Meaning

  1. one terminationof the same herd or flock
    Equinis armentis namque me congregem pastor egregius mandati dominici serus auscultator aliquando permisit.2nd century CE, Apuleius Madaurensis, Metamorphoses 7.16.4
  2. one terminationcollected in flocks
    Iam tribus choros videres feriantis noctibus Congreges inter catervas ire per saltus tuos,uncertain date, Pervigilium Veneris
    Nam populi coetus et compita sordida rixis fastidientes cernimus angustas fervere vias et congrege volgo nomen plateas perdere, turbida congestis referitur vocibus echo: ‘Tene, feri, duc, da, cave!’ sus lutulenta fugit, rabidus canis impete saevoc. 310 CE – c. 394 CE, Ausonius, Epistularum
  3. one terminationclose, intimate
    iam mundus te, Christe, capit, quem congrege nexu pax et Roma tenent, capita haec et culmina rerum esse iubes, nec Roma tibi sine pace probatur, et pax ut placeat facit excellentia Romae, quae motus varios simul et dicione coercet et terrore premit; nec enim spoliata prioris348 CE – c. 413 CE, Prudentius, Contra Symmachum 2.635

Declension

singular
formmasculinefeminineneuter
nominativecongrexcongrexcongrex
genitivecongregiscongregiscongregis
dativecongregīcongregīcongregī
accusativecongregemcongregemcongrex
ablativecongregecongregecongrege
vocativecongrexcongrexcongrex
plural
formmasculinefeminineneuter
nominativecongregēscongregēscongrega
genitivecongregumcongregumcongregum
dativecongregibuscongregibuscongregibus
accusativecongregīs
congregēs		congregīs
congregēs		congrega
ablativecongregibuscongregibuscongregibus
vocativecongregēscongregēscongrega

con-grex, grĕgis, adj. (post-class.).
I. Of the same herd or flock: equinis armentis, App. M. 7, p. 194, 41: aves, Sol. 2 dub. (al. congregatae).—Hence,
II. In gen., collected in flocks or multitudes: catervas, Auct. Pervig. Ven. 43: vulgo, Aus. Ep. 10, 21.—With dat.: comessationibus, Tert. Poen. 11.—
B. Trop., close, intimate: aliquem congrege nexu tenere, Prud. contra Symm. 2, 634.

Origins

Either from con- + grex (“flock”) or back-formation from congregō.

Quick answers

What does congrex mean in Latin?
congrex, a adjective, means “of the same herd or flock; collected in flocks; close, intimate”.
How do you pronounce congrex?
In classical Latin, [ˈkɔŋ.ɡrɛks]; in ecclesiastical (church) Latin, [ˈkɔŋ.ɡreks].