die：to stop being alive
pass away：to die。This word is used to avoid saying “die” when you think this might upset someone
suffocate：to die because you cannot breathe, or to kill someone in this way
drown：to sink under water and die
starve：to suffer or to die because there is not enough food
lose your life：to die as a result of something such as an accident, war, or illness
lay down your life：to die as a result of doing something good for other people
perish：to die, usually because of an illness or something that happens suddenly
expire：to die
breathe your last (breath)：to die
注释：expire做“断气,死亡”解为书面语，委婉用词。从本义“从肺部吐出气来”引申为吐出最后一口气，断气而死。例：The old lady expired within the hour.那个老太太不到一小时就死了。