unthinking russian

• безду́мный

  thoughtless, insouciant, unthinking, feckless

• машина́льный

  mechanical, automatic, unthinking, machine-like

• безду́мно

  thoughtlessly, unthinkingly, carelessly

• механи́чески

  mechanically, by machine

  mechanically, automatically, unthinkingly

• бря́кнувший

  that clanked, that thudded, having clanked, having thudded

  blurted out, that was blurted out, unthinkingly said