Englishharum-scarum
adjective
informal
he was a harum-scarum young fellow:
reckless, impetuous, impulsive, imprudent, rash, wild, daredevil, madcap, precipitous, precipitate, frivolous, hotheaded, harebrained, giddy, foolhardy, thoughtless, incautious, careless, heedless, hasty, overhasty;
informal devil-may-care, dippy;
British, informal divvy, dotty, scatty;
rare temerarious.
▷antonyms cautious.