elderly

Compared meaning: having lived a long time (adjective).

比较义项：年纪大、年老的（形容词）。

• old

  The plain, all-purpose word for age; used for people, animals, or things alike; neutral, with no built-in politeness or respect, and can sound blunt when applied directly to a person.

  最普通、中性的表示“老”的词，可用于人、动物或物品；不带礼貌或尊敬的意味，直接用来形容某人时可能显得唐突。

  My neighbor's old dog can barely climb the stairs anymore.

  我邻居家那只老狗现在几乎爬不上楼梯了。

• elderly 本词

  A polite, more formal way to refer to people who are old; used only for people, never for animals or objects, and common in respectful or public contexts.

  一个礼貌、较正式的说法，用来指年长的人；只能用于人，不能用于动物或物品，常见于表示尊重的公共场合。

  It's polite to offer your seat to elderly passengers on a crowded bus.

  在拥挤的公交车上给年长的乘客让座是礼貌的行为。

• venerable

  Suggests deep respect earned through age, wisdom or long service, not just physical age; used for esteemed people or institutions, and has a formal, almost literary tone.

  不仅表示年纪大，还强调因年长、智慧或长期贡献而赢得的深深敬意；常用于受人尊敬的人物或机构，语气正式，略带书面色彩。

  Nelson Mandela is remembered as a venerable statesman who fought for justice.

  纳尔逊·曼德拉被人们铭记为一位为正义而战、德高望重的政治家。

• aged

  A formal, literary word meaning very old; often placed directly before a noun to describe people (or sometimes things) that have existed a long time, with a slightly detached, clinical tone.

  一个正式、书面化的词，意为“很老的”；常直接放在名词前修饰存在已久的人（有时也指物），语气略显客观、疏离。

  His aged parents now need constant care every day.

  他年迈的父母现在每天都需要有人持续照料。

Old, elderly, venerable, and aged all mean having lived a long time. Old is plain and neutral. Elderly is more polite, for people. Venerable means respected for age or wisdom. Aged is formal, before nouns. Old's 'not new' sense and aged's food sense aren't compared.

这四个词都可以表示人“年纪大”，但语气和适用范围不同：old最中性，可用于人、动物或物品；elderly只用于人，语气礼貌委婉；venerable强调因年长、智慧或贡献而令人敬重；aged语气正式书面，常直接修饰名词。这里不比较 old 表示“旧的、原来的”（如物品陈旧）的义项，也不比较 aged 表示食物或酒“经过陈化处理”的义项（如 aged cheese）。