A root in the Qenya Lexicon of the 1910s given as ᴱ√ᴵRTYᴵR “peck, prick” with derivatives ᴱQ. irtin “I peck, prick” and ᴱQ. irt “a peck, pinprick” (QL/43); the vowel i is simply the usual result of the syllabification of ṛ before a palatal consonant in Early Qenya (PE12/10). The words G. irt⁽⁾ “beak (of small birds)” and G. irtha- “peck” are clearly related (GL/52). I think it’s worth positing a Neo-Root ᴺ√IRIT “peck, prick” to salvage these early words.
Early Primitive Elvish
iři
root. dwell‽
iri Reconstructed
root. wish, intend
iði
root. dwell‽
ṛtyṛ
root. peck, prick
A root in the Qenya and Gnomish Lexicons given as ᴱ√IŘI (QL/43) and iđ- (GL/50), the latter more representative of its true form. In the Qenya Lexicon it was glossed “dwell”, but Tolkien marked this gloss with a “?”. It had derivatives like ᴱQ. indo/G. ind “house”, ᴱQ. irmin/G. Idhru “world”, and ᴱQ. Indi/G. idhrin “men, earth dwellers”. Based on the last of these, a probable variant is the deleted root ᴱ√(I)LÐ(I)L, also in the Qenya Lexicon with the (rejected) derivative ᴱQ. ildi “men” (QL/42).
There are no signs of this root in Tolkien’s later writing, and both “men” and “world” were generally derived from other roots, the latter from √MBAR “dwell”, the likeliest replacement for this root.