sextant

n. 六分仪（航海定向仪器）

sewage works, sewer, sewerage, sewing, sewing-machine, sewn, sex, sex act, sex appeal, sex life, sex-, sex-starved, sexagenarian, sexily, sexiness, sexism, sexist, sexless, sexologist, sexology, sextet (also sextette), sexton, sexual, sexual intercourse (also intercourse), sexuality, sexually, sexy, SF, sgd, Sgt, sh, shabbily, shabbiness, shabby, shack, shackle, shad, shade, shadily, shadiness,