Q. hloirë n. “venom, poison, poisonousness” (Category: Poison)
A noun in Quenya Notes (QN) from 1957 glossed “venom, poison(ousness)” derived from the root √SLOY (PE17/185). I think this applies to poison in the abstract, as opposed to hloima used for a specific venomous substance.
Reference ✧ PE17/185 ✧ hloire “venom, poison(ousness)”
|√SLOY > hloire||[sloire] > [l̥oire]||✧ PE17/185|