*ᴱ√QOÐO root. “*choke, suffocate, drown”
An unglossed root in the Qenya Lexicon of the 1910s given as ᴱ√QOŘO [QOÐO] having derivatives like ᴱQ. qoro- “choke, suffocate, drown” and ᴱQ. qonda “choking smog, smoke” (QL/78); it also had a variant form (probably a distinct root) ᴱ√QOSO from which ᴱQ. qosse “mist” was likely derived.
Neo-Eldarin: I think it worth positing a Neo-Eldarin root ᴺ√KWOD to preserve some of these Early Qenya words, but bear in mind there is strong evidence that the combination quo- was not possible in Tolkien later iterations of Quenya, as discussed in the entry for how [wo] became [o] in Quenya.
References ✧ LT1A/Qorinómi; QL/78