Irregardless is a word that caused controversy since it first appeared in the early twentieth century. It is generally listed in dictionaries as "non-standard".
Origin
The origin of irregardless is not known for certain, but the consensus among references is that it is a portmanteau of irrespective and regardless, both of which are commonly accepted standard English words. By blending these words, an illogical word is created. "Since the prefix ir- means 'not' (as it does with irrespective), and the suffix -less means 'without,' irregardless is a double negative."[1]. (Cf. inflammable, flammable.)
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