'shadow-caused' originates from the combination of 'shadow' and 'caused', where 'shadow' refers to a dark area or shape produced by a body coming between rays of light and a surface, and 'caused' means to make something happen.

'shadow' and 'caused' have been used in English since the Middle Ages, with 'shadow' deriving from Old English 'sceadu' and 'caused' from Latin 'causa'.

Initially, 'shadow' referred to any dark shape or area, and 'caused' meant to bring about. The combination 'shadow-caused' specifically refers to effects or phenomena resulting from shadows.