Proto-IE: *tēres-
Meaning: earth
Latin: terra f. `Erde', terrestris, -e `irdisch; auf dem Lande befindlich', terrēnus, -a `irden', extorris `verbannt'
Other Italic: Osk teer[úm], terúm `territōrium', teras `terrae'
Celtic: *tēros-, *tēres- ? > OIr tīr n. `Gebiet'; OCymr, Corn, Bret tir 'tellus'
Russ. meaning: земля
References: WP I 737 f