terr

earth, land

Spelled terr · terra 'earth, land'

Latin terra, land: terrain describes the ground, territory marks claimed land, and subterranean spaces lie beneath it.

Words built from it

terrace — a flat raised area of land
terr (land) + -ace (place of)
terrain — the physical features of an area of land
terr (land) + -ain (belonging to)
territory — an area of land under someone's control
terr (land) + -itory (place of)
territorial — relating to or defensive of one's territory
terr (land) + -itorial (relating to a territory)
terrestrial — relating to the earth or land
terr (land) + -estrial (relating to)
subterranean — existing or occurring below the earth's surface
sub- (under) + terr (land) + -anean (relating to)

terrify — from Latin terrere 'to frighten' + -fy; a different Latin root that only coincidentally resembles terra 'earth'.
terror — from Latin terror, from terrere 'to frighten'; unrelated to terra 'earth' despite the identical spelling of terr-.