Regardless
Part of speech: adverb
Definition: Without attention to warnings or indications of bad consequences.
Part of speech: adjective
Definition: Having no regard; heedless; careless.
Part of speech: preposition
Definition: Paying no attention to; regardless of.
Example sentence: Forgiveness is an act of the will, and the will can function regardless of the temperature of the heart.
Careless
Part of speech: adjective
Definition: Free from care; unworried, without anxiety.Not concerned or worried (about).Not giving sufficient attention or thought, especially concerning the avoidance of harm or mistakes.
Example sentence: There is no fool like a careless gambler who starts taking victory for granted.