"earthly, terrestrial, of or pertaining to the earth," c. 1300, from Anglo-French terreine, Old French terrien, from Latin terrenus "on the earth, earthly," from terra "earth" (from PIE root *ters- "to dry").
Entries linking to terrene
*ters-
Proto-Indo-European root meaning "to dry."
It forms all or part of: inter; Mediterranean; metatarsal; parterre; subterranean; tarsal; tarsus; Tartuffe; terra; terrace; terra-cotta; terrain; terran; terraqueous; terrarium; terrene; terrestrial; terrier; territory; thirst; toast; torrent; torrid; turmeric; tureen.
It is the hypothetical source of/evidence for its existence is provided by: Sanskrit tarsayati "dries up;" Avestan tarshu- "dry, solid;" Greek teresesthai "to become or be dry," tersainein "to make dry;" Latin torrere "dry up, parch," terra "earth, land;" Gothic þaursus "dry, barren," Old High German thurri, German dürr, Old English þyrre "dry;" Old English þurstig "thirsty."