(adjective) 1) tadui (lenited dadui; no distinct pl. form), 2) edwen (pl. edwin).
Sindarin
tadui
ordinal. second
tadui
ordinal. second
tadui
second
tadui
second
(lenited dadui; no distinct pl. form)
aduial
second twilight
(evendim, the time of evening when the stars come out), pl. aduiail.
edwen
ordinal. second
edwen
ordinal. second
tadeg
ordinal. second
taid
adjective. second (in the sense of supporting, second in command)
ad
second
(as prefix) ad-, also meaning "back, again, re-", e.g. aderthad "Reunion", and also in the term for
ad
second
also meaning "back, again, re-", e.g. aderthad "Reunion", and also in the term for
edwen
second
(pl. edwin).
The Sindarin word for “second”, an adjectival form of tâd “two” in notes from the late 1960s using the adjectival suffix -ui (VT42/25).
Conceptual Development: Earlier in these same 1960s notes, Tolkien had tadeg as the colloquial word for “second” but this word was deleted (VT42/10).
Sometime around 1950, the King’s Letter in the unpublished epilogue to The Lord of the Rings had a word edwen “second” in the phrase egor ben genediad Drannail erin Gwirith edwen “or in the Shire-reckoning the second day of April” (SD/129). The preceding phrase had dolothen “eighth”, clearly a mutated form of tolothen which was an adjectival form of toloth “eight” with the adjectival suffix -en rather than later -ui. The same suffix can be seen in edwen, and its initial element might be related to adu (adw-) “double”.
The Gnomish Lexicon of the 1910s had G. obin “second, next” based on G. ob “after, close behind” (GL/62).