'non-variegated' is a Modern English formation combining the prefix 'non-' (meaning 'not') with the adjective 'variegated' (meaning 'having different colors or markings').

'variegated' derives from Latin 'variegatus' (past participle of 'variegare'), ultimately from Latin 'varius' meaning 'various'; the element 'non-' comes from Latin 'non' meaning 'not'. Over time these elements were combined in English to form the negated adjective 'non-variegated'.

Originally, forms related to 'variegate' carried the sense 'made varied' or 'marked with different colors'; over time 'variegated' came to mean 'having streaks or patches of different colors', and 'non-variegated' consequently means 'not having such variegation' or 'uniform in color'.