The words regardless and irregardless mean the same thing. The words regardless and irregardless mean the same thing.

The words regardless and irregardless mean the same thing.

However, regardless is the more commonly used of the two because the prefix “ir” and suffix “less” are two negative elements that together cause the meaning of irregardless to be unclear.

Irregardless is primarily used in speech and not in written prose. Regardless is generally the more accepted word.