I have also tried to explain what made those theories so lethally appealing.
Larry King Live lets her reach a bigger audience, of course, but his show is lethally uncool.
1580s, from Late Latin lethalis, alteration of Latin letalis "deadly, fatal," from letum "death," of uncertain origin. Form altered in Late Latin by association with lethe hydor "water of oblivion" in Hades in Greek mythology, from Greek lethe "forgetfulness."
lethal le·thal (lē'thəl)
Capable of causing death.
Of, relating to, or causing death.