необмислен

• rash, thoughtless, hasty, lightheaded, improvident, unadvised, ill-advised, ill-judged, unconsidered, unwary ; overbold; impetuous
• НЕОБМИСЛЕНа постъпка a rash/hasty, etc. act; an indiscreet step; an imprudence
• прилагателно
• helter-skelter прибъзран, стремглав
• ill-considered