Besides being a double negative that results in it not being equivalent to regardless, to your point it's been used for at least 100 years and is still considered non standard.
so you agree? "Word Origin and History for irregardless an erroneous word that, etymologically, means the opposite of what it is used to express. Attested in non-standard writing from at least 1870s probably a blend of…
Irregardless is not a word
Besides being a double negative that results in it not being equivalent to regardless, to your point it's been used for at least 100 years and is still considered non standard.
so you agree? "Word Origin and History for irregardless an erroneous word that, etymologically, means the opposite of what it is used to express. Attested in non-standard writing from at least 1870s probably a blend of…
Irregardless is not a word