pyjamas
/pəˈdʒɑːməz/( <美> pajamas)
plural noun
1- a suit of loose trousers and jacket for sleeping in睡衣裤：
a pair of pyjamas
一套睡衣裤
as modifier (pyjama) pyjama trousers.睡裤。
1.1
- in sing.
pyjama
a pair of loose trousers tied by a drawstring around the waist, worn by both sexes in some Asian countries（亚洲男女围腰而系的）宽松裤。
词源
early 19th cent.: from Urdu and Persian, from pāy 'leg' + jāma 'clothing'.