Quenya 

queren

noun. pivot, revolving center

queren

pivot

#queren noun "pivot" (PE17:65), only cited as a stem-form querend-. (Cf. peltas.) It is unclear whether Tolkien rejected this word or not.

peltas

pivot

peltas (peltax-, as in pl. peltaxi ["ks"]) noun "pivot" (PEL, TAK)