sediment

n. 沉淀物，渣

sector, secular, secularism, secularist, secularize, secularise, secure, securely, securities, security, security guard, security risk, sedan, sedate, sedately, sedateness, sedation, sedative, sedentary, sedge, sedgy, sediment-covered, sedimentary, sedimentation, sedition, seditious, seditiously, seduce, seducer, seduction, seductive, seductively, seductiveness, sedulity, sedulous, sedulously, see, see (to it) that, see about, see about sth., see after,