Sindarin 

ir

conjunction. (?) when

This word is not translated. It could be related to Quenya íre "when". Some scholars also consider that it could be the form taken by the article i before a vowel, on a pattern similar to ah . To this respect, it might be interesting to note the ir was the allative/dative form of the article in the old Gnomish lexicon, PE/11:9

Sindarin [LB/354] Group: SINDICT. Published by

neman

adverb. when, (lit.) during what

@@@ based on the theory that ned = “during”

Elements

WordGloss
ned“first, one more; first; during”
man“*what, who”
Sindarin Group: Eldamo - fan inventions. Published by

ir

when

?ir (not used in questions but to indicate time, as in ”when I saw you, I was glad”). This is one of several possible interpretations of the word, which occurs in a Sindarin poem untranslated by Tolkien (ir Isil ammen Eruchín…síla, ?”when the Moon shines for us Children of Eru…”, The Lays of Beleriand p. 354). By another interpretation, ir is simply a variant of the definite article.(relative pronoun), see THAT