'standardly-mixed' originates from the combination of 'standardly,' an adverb form of 'standard,' and 'mixed,' the past participle of 'mix.'

'standardly' evolved from the noun 'standard,' which has roots in Old French 'estandart,' and 'mixed' comes from the Old English 'miscian.'

Initially, 'standardly' referred to anything done according to a standard, and 'mixed' meant combined. Together, they imply a consistent method of mixing.