The letter Ϸ ϸ, sometimes called sho or san, was a letter added to the Greek alphabet in order to write the Bactrian language. It was similar in appearance to the Old English and Icelandic letter thorn (þ), which has typically been used to represent it in modern print, although they are historically unrelated. It probably represented a sound similar to English "sh". Its conventional transliteration in Latin is ⟨š⟩.