black-and-blue
UK[ˌblæk ən ˈbluː]US[ˌblæk ən ˈbluː]
adj
(of a part of the body) covered with bruises, appearing dark blue and purple
Etymology
the compound "black-and-blue" is a descriptive english phrase that emerged to vividly depict the visual appearance of a severe bruise. it leverages the basic color terms 'black' and 'blue', which have deep germanic roots, to create a metaphorical spectrum of discoloration. the phrase does not refer to the literal colors separately but combines them to signify the pooled blood and tissue damage beneath the skin following an injury. this figurative use of color terms to describe a physical condition is a common feature in english, providing a direct and universally understood image of trauma.
Analysis
this is a compound adjective formed from two color terms, 'black' and 'blue', joined by the conjunction 'and'. 'black' originates from old english blæc, meaning "dark, ink." 'blue' originates from old english blāw, related to old high german blāo, meaning "shining, livid." the conjunction 'and' comes from old english and, ond.
Examples
after the fall, his arm was black-and-blue for weeks.
the boxer emerged from the match with a black-and-blue face.
she had a nasty black-and-blue mark on her shin from bumping into the table.