Medieval Hebrew was a literary and liturgical language that existed between the 4th and 19th century. It was not commonly used as a spoken language, but mainly in written form by rabbis, scholars and poets. Medieval Hebrew had many features that distinguished it from older forms of Hebrew. These affected grammar, syntax, sentence structure, and also included a wide variety of new lexical items, which were either based on older forms or borrowed from other languages, especially Aramaic, Greek and Latin.