Word Origin & History
terrain
1727, "ground for training horses," from Fr. terrain "piece of earth, ground, land," from O.Fr. (12c.), from V.L. *terranum, from L. terrenum "land, ground," from neut. of terrenus "of earth, earthly," from terra "earth, land," lit. "dry land" (as opposed to "sea"); from PIE base *ters- "to dry" (cf. Skt. tarsayati "dries up," Avestan tarshu- "dry, solid," Gk. teresesthai "to become or be dry," L. torrere "dry up, parch," Goth. þaursus "dry, barren," O.H.G. thurri, Ger. dürr, O.E. þyrre "dry;" O.E. þurstig "thirsty"). Meaning "tract of country, considered with regard to its natural features" first attested 1766.