ᴱ√SUẈU root. “*feminine patronymic”
An unglossed root in the Qenya Lexicon of the 1910s with derivatives like ᴱQ. sui “daughter”, ᴱQ. súyon “nephew, daughter’s son”, and ᴱQ. fion < ᴱ✶þẉ-iı̯on-d, hinting at a variant root form ᴱ√ÞUẈU (QL/87). In the contemporaneous Gnomish Lexicon there were forms like G. fwi- and G. -thwi as feminine patronymics as wells as G. fwion “nephew” and G. fwîr “niece” as children of one’s sister (GL/36). G. suil “daughter” was also related (GL/68), and deleted form thuil “daughter” (GL/73) seems to indicate ᴱ√ÞUẈU >> ᴱ√SUẈU.
Reference ✧ QL/87