caer

Sindarin numbers
min = one tâd = two nêl, neleð = three canad = four leben = five eneg = six odog = seven toloth = eight neder = nine caer or pae = ten minib = eleven ýneg = twelve

caer and pae are words for the number ten (10, X) in Sindarin.

In Noldorin, the precursor of Sindarin, "ten" is caer. The word derives from root KAYAN-, KAYAR-.