- tâd (in compounds tad-, as in tad-dal ”two-legged”), 2) (adjectival prefix) ui- (twi-, both).
Sindarin
atha-
verb. will (future)
tâd
cardinal. two
tâd
cardinal. two
ent
pronoun. they, 3rd pl. pronoun
est
pronoun. they, 3rd pl. pronoun
idi(r)
pronoun. they, 3rd pl. pronoun
ith
pronoun. they, 3rd pl. pronoun
tad
cardinal. two
tâd
cardinal. two
tad-dal
two-legged
(lenited dad-dal), pl. tad-dail.
tâd
two
(in compounds tad-, as in tad-dal ”two-legged”)
ui
two
(twi-, both).
The usual Sindarin word for “two” derived from ✶tata, a variant of √ATATA that was the basis for Q. atta “two” (PE17/14; VT42/27; Ety/TATA). It appears with both a short vowel as tad and a long vowel as tâd. I think the long-vowel form is the most correct one, but the short-vowel form is used for prefixes or when the word is not emphasized in a phrase.
Conceptual Development: The Gnomish Lexicon of the 1910s had G. atha “two”, but this was deleted and revised to G. atha as the “pl. 3rd person pronoun” (GL/20) and no new word for “two” was given.