where does the word achilles heel come from
Achilles' heel In Greek mythology, when Achilles was a baby, it was foretold that he would die young. To prevent his death, his mother Thetis took Achilles to the River Styx, which was supposed to offer powers of invulnerability, and dipped his body into the water; however, as Thetis held Achilles by the heel, his heel was not washed over by the water of the magical river. Achilles grew up to be a man of war who survived many great battles. One day, a poisonous arrow shot at him was lodged in his heel, killing him shortly afterwards.
Flip-flops The term flip-flop has been used in American and British English since the 1970s to describe the thong or no-heel-strap sandal. It is an onomatopoeia of the sound made by the sandals when walking in them.[1] They are called thongs in Australia,[2] jandals (originally a trademarked name derived from "Japanese sandals") in New Zealand,[3] slops in South Africa[4] and tsinelas in the Philippines (or, in some Visayan localities, "smagul", from the word smuggled).