diaboliclyadv.
/ˌdʌɪəˈbɒlᵻkli/, U.S. /ˌdaɪəˈbɑləkli/ rare.
In a diabolical manner; devilishly; wickedly; = diabolically adv. 1.
ΘΚΠ
the mind > goodness and badness > badness or evil > diabolicalness > [adverb]
devillyOE
serpentinously1502
devilishly1528
diabolicallya1600
serpent-like1608
diabolicly1683
society > morality > moral evil > wickedness > [adverb] > diabolically or fiendishly
devillyOE
serpentinously1502
devilishly1528
satanically1590
diabolicallya1600
serpent-like1608
diabolicly1683
demonically1834
1683 E. Hooker in J. Pordage Theologia Mystica Pref. Epist. 21 Sin is..autoritativly, exemplarily and Diabolicly, in public, countenanced.
1964 J. D. Valaik Amer. Catholics & Spanish Civil War (Ph.D. diss., Univ. of Rochester, N.Y.) iv. 138 Who else but ‘Reds’, the Russian Communists and their Spanish minions, could be so diabolicly cruel?
1988 Weekly World News 10 May 28 (advt.) Newport Millionaire Claus Von Bulow, accused of diabolicly murdering his heiress wife.
This entry has been updated (OED Third Edition, June 2016; most recently modified version published online March 2022).
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adv.1683