A word appearing as ᴱQ. qonda “choking smog, smoke” in the Qenya Lexicon of the 1910s, derived from the early root ᴱ√QOŘO [QOÐO] along with other choking words (QL/78).

Neo-Quenya: I think this word can be salvaged as ᴺQ. quonda based on a Neo-Root ᴺ√KWOD, but not all Neo-Quenya writers accept quo- as a valid combination in Quenya: see the discussion of how [wo] became [o] for details. If you do use quonda, I would use it for a thick choking smoke (smog) as opposed to ordinary smoke for which I’d use Q. usquë.