'blood-like' originates from the combination of 'blood' and the suffix '-like', where 'blood' refers to the red fluid circulating in the veins and '-like' means 'resembling or similar to'.

'blood' comes from Old English 'blōd', and '-like' is a common English suffix used to form adjectives.

Initially, 'blood-like' meant 'similar to blood in appearance or characteristics', and this meaning has remained consistent.