Adverbial has 2 senses

• insanely(r = adv.all) crazily, dementedly, madly - in an insane manner; "he behaves crazily when he is off his medication"; "screaming dementedly"; "she behaved insanely"; "the witch cackled madly"
Antonym: sanely

• insanely(r = adv.all) deadly, deucedly, devilishly, madly - (used as intensives) extremely; "deadly dull"; "deadly earnest"; "deucedly clever"; "insanely jealous"; "she was madly in love"