harlot: [13] The use of harlot for ‘prostitute’ is a comparatively recent development in the word’s history. It originally meant ‘tramp, beggar’, and did not come to mean ‘prostitute’ until the 15th century. It was borrowed from Old French harlot or herlot ‘vagabond’, a word of unknown ancestry with relatives in Italian (arlotto) and Provençal (arlot). [harlot etymology, harlot origin, 英语词源]