Sindarin 

naub

noun. thumb

A word for the thumb given as nawb in notes on Eldarin Hands, Fingers and Numerals from 1968 (VT48/5), clearly based on the root √NAP “pick up” (VT47/29). Its dual form nobad was used to refer to the “thumb and index [finger] as a pair” (VT48/5).

Conceptual Development: In rough drafts of these notes, Tolkien used lebed for “thumb, picker” from primitive ✶lepet(ā) (VT47/27). In early writings N. lhebed was instead “finger” (Ety/LEP), and its use for “thumb” was likely a transient idea.

nawb

noun. thumb

Sindarin [VT/48:5] Group: SINDICT. Published by

naub

thumb

*naub (pl. noeb). The spelling used in the source is nawb (VT48:5). Dual nobad, used of the thumb and the index finger grouped together in the act of picking something (VT48:5, 6). In childrens play the thumb was also called atheg, ”little father” (pl. ethig) (VT48:6, 17)

lebed

noun. thumb