The story
From Hindustani शलवार क़मीज़ (śalvār qamīz) / شلوار قمیص (śalvār qamīs), from Persian, from Arabic.
Etymology from Wiktionary, CC BY-SA 4.0.
shalwar kameez
Today it means: An outfit worn by men and women in South Asian countries comprising loose trousers and a long shirt. Full definition →