Thuggee (or tuggee, ठग्गी) (from Hini thag ‘thief’, from Sanskrit sthaga ‘scoundrel’, from sthagati ‘to conceal’) was an Indian network of secret fraternities engaged in murdering and robbing travellers, operating from the 17th century (possibly as early as 13th century) to the 19th century. This is the origin of the term "thug", as many Indian words passed into common English during British Imperial rule of India.