This one's easy. If someone is maniacal then they're behaving like a maniac. Add an ly to make it an adverb, and you get maniacally, as in "she's acting maniacally."
Affected with, or characterized by, madness; maniac.
Adjective S.
wildly disordered; "a maniacal frenzy"
a.
Affected with, or characterized by, madness; maniac.
Maniacal
Affected with, or characterized by, madness; maniac.
Usage Examples
Everybody hangs out with everybody, which is very strange for a cast this large and this young. We're all cool and down to earth and not caught up in this maniacal business at all... . Everybody really, really likes everybody else.
Misspelled FormManiacal, Maniacal, aniacal, Maniacal, Mqaniacal, Mwaniacal, Msaniacal, Mzaniacal, Mqniacal, Mwniacal, Msniacal, Mzniacal, Maqniacal, Mawniacal, Masniacal, Mazniacal, Mabniacal, Mahniacal, Majniacal, Mamniacal, Ma niacal, Mabiacal, Mahiacal, Majiacal, Mamiacal, Ma iacal, Manbiacal, Manhiacal, Manjiacal, Manmiacal, Man iacal, Manuiacal, Man8iacal, Man9iacal, Manoiacal, Manjiacal, Mankiacal, Manuacal, Man8acal, Man9acal, Manoacal, Manjacal, Mankacal, Maniuacal, Mani8acal, Mani9acal, Manioacal, Manijacal, Manikacal, Maniqacal, Maniwacal, Manisacal, Manizacal, Maniqcal, Maniwcal, Maniscal, Manizcal, Maniaqcal, Maniawcal, Maniascal, Maniazcal, Maniaxcal, Maniadcal, Maniafcal, Maniavcal, Mania cal, Maniaxal, Maniadal, Maniafal, Maniaval, Mania al, Maniacxal, Maniacdal, Maniacfal, Maniacval, Maniac al, Maniacqal, Maniacwal, Maniacsal, Maniaczal, Maniacql, Maniacwl, Maniacsl, Maniaczl, Maniacaql, Maniacawl, Maniacasl, Maniacazl, Maniacakl, Maniacaol, Maniacapl, Maniaca:l, Maniacak, Maniacao, Maniacap, Maniaca:, Maniacalk, Maniacalo, Maniacalp, Maniacal:.
Other Usage ExamplesOur society is run by insane people for insane objectives. I think we're being run by maniacs for maniacal ends and I think I'm liable to be put away as insane for expressing that. That's what's insane about it.