mattress

n.床垫，气垫

matrices, matricide, matriculate, matriculation, matrimonial, matrimony, matrix, matrix printer, matron, matron of honour, matronly, matt, mat (US also matte), matter, matter of fact, matter-of-fact, matter-of-factly, Matterhorn, matting, mattins, mattock, maturation, mature, maturely, maturity, maudlin, maul, maulstick, maunder, Maundy Thursday, mausoleum, mauve, maven, maverick, maw, mawkish, mawkishly, mawkishness, max, maxim, maximal,