seersucker (n.)
1722, from Hindi sirsakar, East Indian corruption of Persian shir o shakkar "striped cloth," literally "milk and sugar," a reference to the alternately smooth and puckered surfaces of the stripes. From Persian shir (cognate with Sanskrit ksiram "milk") + shakar (cognate with Pali sakkhara, Sanskrit sarkara "gravel, grit, sugar;" see sugar (n.)).