saltpetre (US saltpeter)

n [U] salty white powder used in making gunpowder, for preserving food and as medicine 硝酸钾; 硝石.

salivary, salivate, salivation, sallow, sallowness, sally, salmon, salmon-pink, salmon-trout, salmonella, salon, saloon, saloon bar, salsify, salt, salt-cellar (US `salt-shaker), salt-lick (also lick), salt-mine, salt-pan (also pan), salt-water, salty, salubrious, salubriousness, salutary, salutation, salute, salution, salvage, salvageable, salvation, Salvation Army, salve, salver, salvo, SAM, Samaria, Samaritan, samba, same, sameness,