Teghá is Arabic for "blade" but is commonly used since at least the late 19th century as a word to describe a type of Indian sword with a talwar style hilt and a very wide and deeply curved blade.1
"The broad curved sword (teghá) is in use among the Hindu Rángars and Mohamedan Rajputs." 2
-Lord Egerton of Tatton, 1880
A north Indian teghá, possibly from Lahore.
1. See Rawson, P.S.; The Indian Sword, Herbert Jenkins, London, 1968. Page 9 and 84.
2. Lord Egerton of Tatton; Indian and Oriental Arms and Armour. Dover Publications; Revised edition, 2002. Page 105.