Sindarin 

ceven

earth

  1. ceven (i geven, o cheven), pl. cevin (i chevin) (VT48:23), 2) (world) Amar (archaic Ambar), pl. Emair; 3) bâr (dwelling, house, home, family; land) (i mâr, o mbâr, construct bar), pl. bair (i mbair). Also -bar, -mar at the end of compounds. 4) (maybe ”earth” as substance) cae (i gae, o chae). No distinct pl. form even if there is a pl., except with article (i chae). For ”earth” as a substance, see also SOIL.