A noun for “blood” in The Etymologies of the 1930s from the root ᴹ√YAR of the same meaning (Ety/YAR). Tolkien considered changing the root to ᴹ√YOR and the Quenya form to yōr (EtyAC/YAR).
Conceptual Development: The word ᴱQ. hari “blood” from the Early Quenya Grammar (EQG) of the 1920s might be a precursor. It in turn was probably related to earlier ᴱQ. hara(nda) “flesh-meat” from Qenya Lexicon of the 1910s (QL/39).
Neo-Quenya: Since Tolkien changed its cognate from [N.] iâr to [S.] agar, this Quenya word is probably no longer valid, and for purposes of Neo-Quenya I recommend using the later word Q. sercë “blood” instead.
A verb in the Quenya Verbal System (QVS) from 1948, glossed “creep” and based on the root ᴹ√SLIK of the same meaning (PE22/113). It also had a frequentative form lilhikke “sneak about”, indicating the base verb may mean “✱sneak” as well.