Careful. Also heedful or diligent.
careful
The opposite of cautious is: Careless or Hasty
it means careless
careless parents
careless
careless, uncaring
Careful.
The opposite of drive safe is careless driving.
careful
careful; responsible
Not caring, uncaring, careless
Irresponsible; careless; impulsive; flighty.
Inaccurate, careless, wrong, faulty.