'light-resistant' originates from the combination of 'light' and 'resistant', where 'light' refers to natural or artificial illumination and 'resistant' means having the ability to withstand or oppose something.

'Light-resistant' is a modern English term formed by combining 'light' and 'resistant', both of which have roots in Old English and Latin respectively.

Initially, 'resistant' meant 'able to withstand', and this meaning has largely remained the same in modern usage when combined with 'light'.