thug

Origin

Borrowed from Hindustani ठग (ṭhag) / ٹھگ (ṭhag, “swindler, fraud, cheat”), further derived from Prakrit 𑀞𑀕 (ṭhaga), of uncertain origin. See there for more. Thuggee was a network of gangs in India from the 17th century to the 19th century who robbed and murdered travellers, often by strangling. During British Imperial rule of India, many Indian words passed into common English, and by 1810 thug referred to a member of these Indian gangs. The sense was adopted more generally as "ruffian, cutthroat, and cruel robber" by 1839. Perhaps related to English thatch, deck.