Language: Arabic
Source: Egerton
Description
Teghá or tēga is 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
It is probably derived off the Persian tegha (تيغه), which means "blade of a sword of knife".

A north Indian teghá, possibly from Lahore.
Notes
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.