archidiabolical en · ADJ
Etymology
From archi- + diabolical.
Meanings
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(not-comparable, rare) Of or relating to an archdevil.
1933, Malcolm Cowley, “Trotsky and the Art of Insurrection” in Henry Dan Piper (ed.), Think Back on Us . . . A Contemporary Chronicle of the 1930’s by Malcolm Cowley, Carbondale and Edwardsville: Southern Illinois University Press, 1967, p. 28, Always Trotsky displays that archidiabolical pride which is both his virtue as an individual and his most dangerous quality as a statesman.
The goat figure, his satanic majesty, came forward with an archidiabolical dignity […]
1965, John Fowles, chapter 61, in The Magus, Boston: Little, Brown, page 452: