We were greeted by an old, pajama-clad man.
Let's have a pajama party.
Origin of pajama
- Hindi pāyjāmā, pāyjāmā loose-fitting trousers Urdu pāyjāma, pāyjāma loose-fitting trousers from Persian pāyjāma, pāyjāma pāy, pā foot, leg (from Middle Persian pāy foot ped- in Indo-European roots) jāma garment
From American Heritage Dictionary of the English Language, 5th Edition