LATIN DICTIONARYLexicon Latīnum
adjectivefirst/second-declension adjective

frontōsus

frontōsus (feminine frontōsa, neuter frontōsum)
Classical[frɔnˈtoː.sʊs]Ecclesiastical[fronˈtɔː.s̬us]

Meaning

  1. adjectivehaving multiple foreheads
  2. adjectivefigurativelyshameless, bold, foreward

Declension

singular
formmasculinefeminineneuter
nominativefrontōsusfrontōsafrontōsum
genitivefrontōsīfrontōsaefrontōsī
dativefrontōsōfrontōsaefrontōsō
accusativefrontōsumfrontōsamfrontōsum
ablativefrontōsōfrontōsāfrontōsō
vocativefrontōsefrontōsafrontōsum
plural
formmasculinefeminineneuter
nominativefrontōsīfrontōsaefrontōsa
genitivefrontōsōrumfrontōsārumfrontōsōrum
dativefrontōsīsfrontōsīsfrontōsīs
accusativefrontōsōsfrontōsāsfrontōsa
ablativefrontōsīsfrontōsīsfrontōsīs
vocativefrontōsīfrontōsaefrontōsa

frontōsus, a, um, adj. 2. frons,
I. manybrowed, having several foreheads.
I. Lit., said of Janus: frontosior, Aug. Civ. D. 1, 4 fin.—
II. Trop., that has a bold forehead, shameless (late Lat.), Aug. Serm. in Psa. 1, 68.

Origins

From frons (“forehead”) + -ōsus.

Quick answers

What does frontōsus mean in Latin?
frontōsus, a adjective, means “having multiple foreheads; shameless, bold, foreward”.
How do you pronounce frontōsus?
In classical Latin, [frɔnˈtoː.sʊs]; in ecclesiastical (church) Latin, [fronˈtɔː.s̬us].