'non-pigmented' originates from Modern English, formed from the prefix 'non-' (from Latin 'non' meaning 'not') attached to 'pigmented' (from 'pigment' + adjectival suffix '-ed').

'pigment' comes from Latin 'pigmentum' (meaning 'a paint, coloring'), which entered Middle English via Old French; 'pigmented' is the adjectival form formed in English, and 'non-' was prefixed in modern usage to negate it, producing 'non-pigmented'.

Initially components referred to 'coloring' (Latin 'pigmentum' = 'coloring, paint'), and over time the compound simply came to mean 'not having coloration' or 'without pigment' in current usage.