terrestris

Perhaps from Proto-Italic *terzestris, from *terzos +‎ *-tris,^[1] the first of which would also be the base of terrēnus. The suffix -tris is possibly also seen in bimēnstris, as well as palūster, equester, pedester. Reanalysis as terr-estris, as if derived from terra, would have yielded a new suffix -estris which is found in e.g. campester and silvestris. From a synchronic perspective of Classical Latin, terrestris indeed contained the -estris-suffix.

• (Classical Latin) IPA^(key): [tɛrˈrɛs.trɪs]
• (modern Italianate Ecclesiastical) IPA^(key): [t̪erˈrɛs.t̪ris]

terrestris (neuter terrestre); third-declension two-termination adjective

1. Of or pertaining to the earth or land; terrestrial, earthly.

Third-declension two-termination adjective.

• “terrestris”, in Charlton T. Lewis and Charles Short (1879), A Latin Dictionary, Oxford: Clarendon Press
• “terrestris”, in Charlton T. Lewis (1891), An Elementary Latin Dictionary, New York: Harper & Brothers
• "terrestris", 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)
• “terrestris”, in Gaffiot, Félix (1934), Dictionnaire illustré latin-français, Hachette.
• Carl Meißner; Henry William Auden (1894), Latin Phrase-Book‎^[1], London: Macmillan and Co.
  • travel by land, on foot: iter terrestre, pedestre
    
  • geographical knowledge: regionum terrestrium aut maritimarum scientia