(adv.) In a desperate manner; without regard to danger or safety; recklessly; extremely; as, the troops fought desperately.

a corps perdu carelessly demonically fanatically fiercely forlornly frantically frenetically furiously happen what may hastily head over heels headfirst headforemost headlong heedlessly heels over head helter-skelter holus-bolus hopelessly hotheadedly hotly hurriedly hurry-scurry impetuously impossibly like crazy like mad like one possessed madly overeagerly overenthusiastically overzealously precipitantly precipitately precipitously ramble-scramble recklessly severely slam-bang slap-bang slapdash uncontrollably violently wantonly wildly