Minib

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

minib is the number eleven (11, XI) in Sindarin. While the Elves had a duodecimal system, Men did not, and didn't use this term.