decease

decease, disease

这两个单词的拼写仅有一个字母不同。
decease: ／di'si: s／是“死亡”、“去世”；与death相比，decease是正式用语，常见于法律条文中。

• upon the decease of so-and-so，the sum of money will pass to his wife and children.
  某某死后，整笔钱归他妻子及儿女所有。
• the decease rate in that country is very high.
  那个国家的死亡率很高。
• the general's decease left the army without a leader.
  将军死亡使这支军队群龙无首。

disease: ／di'zi:z／是“患病”、“疾病”。acute disease是“急性病”；chronic disease是“慢性病”； family disease是“遗传病”。

• the task of a doctor is to prevent or cure diseases.
  医生的职责是预防或冶疗疾病。
• nowadays more and more people treat diseases by acupuncture.
  如今愈来愈多人用针灸治疗疾病。
• your right lung is diseased.
  你的右肺有病。

die, decease, expire, perish, pass away

这些动词或短语动词均有“死”或“死亡”之意。
die: 最普通用词，指某人或某物失去生命而永远不存在。
decease: 正式用词，多指法律上的用语。
expire: 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。
perish: 书面用词，多指夭折或不幸暴亡。
pass away: 是die的委婉用语。

名词 decease:

1. the event of dying or departure from life
   同义词：death, expiry

动词 decease:

1. pass from physical life and lose all bodily attributes and functions necessary to sustain life
   同义词：die, perish, go, exit, pass away, expire, pass, kick the bucket, cash in one's chips, buy the farm, conk, give-up the ghost, drop dead, pop off, choke, croak, snuff it

1. His decease made us very sad.
   他的去世使我们非常悲伤。