cú ("k")noun "arch, crescent" (KU3); "crescent Moon" (LT1:271; the long vowel was denoted by a circumflex rather than an accent in the early "Qenya" lexicon). In Sindarin, the same word can be used for a "bow" as used to shoot arrows (but possibly this is only quinga in Quenya).
Quenya
ranta
part
ranta
noun. course
cú
arch, crescent
#ranta noun "part". Pl. rantali attested. (PE14:117)