Sindarin 

rist

cleft

(noun) 1) rist (-ris), no distinct pl. except with article (idh rist). Note: a homophone means ”cleaver, cutter”, 2) cirith (i girith, o chirith) (cutting, pass), no distinct pl. form except with article (i chirith), 3) cîl (i gîl, o chîl) (pass between hills, gorge), no distinct pl. form except with article (i chîl), coll. pl. cíliath. A homophone means ”renewal”. 4) criss (i griss, o chriss, construct cris) (cut, slash), no distinct pl. form except with article (i chriss), 4) iaw (gulf, ravine), pl. ioe. Note: a homophone means ”corn”, 5) rest (ravine, cut), pl. rist (idh rist), 6) (deep cleft) falch (ravine[?]), pl. felch