Chinese kinship as a fully-specified type hierarchy

In English, "uncle" subsumes five roles: father's older brother, father's younger brother, mother's brother, father's sister's husband, mother's sister's husband. English resolves these by context or a clarifier. Chinese does neither — each position has its own word, and using the wrong one is the equivalent of a type error.

Chinese kinship encodes the family graph into the terminology. Every term carries four bits: side (paternal or maternal), age (older or younger), gender, and sometimes blood vs. marriage. Bigger tree, but every node you can name is one you no longer have to disambiguate.

// The family graph, as a typed interface.
interface Kinship {
    side: "paternal" | "maternal";
    age: "older" | "younger";
    gender: "male" | "female";
    relation: "blood" | "marriage";
}

// English collapses five distinct nodes into one word.
type EnUncle = FatherOlderBro | FatherYoungerBro | MotherBro
               | FatherSisHusband | MotherSisHusband;

// Chinese keeps them separate.
伯伯 ≠ 叔叔 ≠ 舅舅 ≠ 姑父 ≠ 姨父

1. Immediate family

The core nodes — parents, siblings, children. Even at the closest tier, the terms carry age and gender bits.

immediateFamily() 爸爸 / 妈妈 / 哥哥 / 弟弟 / 姐姐 / 妹妹 / 儿子 / 女儿
TermPinyinMeaningRegister
爸爸bà badadinformal, everyday
妈妈mā mamominformal, everyday
父亲fù qīnfatherformal, written, official forms
母亲mǔ qīnmotherformal, written, official forms
父母fù mǔparentsneutral collective term
哥哥gē geolder brothereveryday
弟弟dì diyounger brothereveryday
姐姐jiě jieolder sistereveryday
妹妹mèi meiyounger sistereveryday
儿子ér zisoneveryday
女儿nǚ érdaughtereveryday
孩子hái zichild (gender-neutral)everyday
兄弟姐妹xiōng dì jiě mèisiblingsthe collective four-character word
No generic "brother" or "sister." Chinese has no word for brother-without-age-info — you must say older or younger. The collectives 兄弟 and 姐妹 work as set terms, but singling out one sibling always forces the age bit.

2. Grandparents — two separate sides

The first place the side bit matters. Paternal and maternal grandparents have different words. The maternal side takes the prefix (wài, "outside") — a reminder that under patrilocal residence, the mother's parents lived "outside" the household.

grandparents(side) paternal: 爷爷 / 奶奶 · maternal: 外公 / 外婆
TermPinyinMeaningSide
爷爷yé yegrandfatherfather's father
奶奶nǎi naigrandmotherfather's mother
外公wài gōnggrandfathermother's father (southern)
外婆wài pógrandmothermother's mother (southern)
姥爷lǎo yegrandfathermother's father (northern)
姥姥lǎo laograndmothermother's mother (northern)
The prefix. It reappears for grandchildren via a daughter. Not pejorative in modern usage — just a structural marker that tags maternal descent explicitly: 孙子 (son's son) vs 外孙 (daughter's son).

3. Uncles, aunts, cousins — the type-safe tier

The tier where English collapses and Chinese refuses to. Five "uncles" and multiple "aunts" are all distinct words; the cousins multiply accordingly.

Father's side

TermPinyinExact relation
伯伯bó bofather's OLDER brother
伯母bó mǔwife of father's older brother
叔叔shū shufather's YOUNGER brother (also: any male friend of parents' age)
婶婶shěn shenwife of father's younger brother
姑姑gū gufather's sister
姑妈gū māfather's sister (slightly more formal/older variant)
姑父gū fuhusband of father's sister

Mother's side

TermPinyinExact relation
舅舅jiù jiumother's brother
舅妈jiù māwife of mother's brother
阿姨ā yímother's sister (also: any female friend of parents' age)
姨妈yí māmother's sister (slightly more formal)
姨父yí fuhusband of mother's sister

Cousins

Cousin terms split by side, gender, and age. Two prefixes: (táng) for cousins who share your surname (father's brother's children), (biǎo) for everyone else.

TermPinyinExact relation
堂兄 / 堂弟táng xiōng / táng dìfather's brother's son, older / younger than you
堂姐 / 堂妹táng jiě / táng mèifather's brother's daughter, older / younger
表兄 / 表弟biǎo xiōng / biǎo dìcousin (mother's side or father's sister's side), male, older / younger
表姐 / 表妹biǎo jiě / biǎo mèisame, female, older / younger
Casual shortcut. People drop the 堂/表 prefix and call cousins , , , when context is clear. The fully-typed terms come out in introductions ("this is my 堂哥") or for disambiguation.

4. Marriage

Spouses, partners, in-laws. In-law terms split by side: "my wife's father" and "my husband's father" are not the same word.

marriage(status) 丈夫 / 妻子 / 老公 / 老婆 / 单身

Partners and spouses

TermPinyinMeaningRegister
丈夫zhàng fuhusbandformal, official, written
老公lǎo gōnghusbandcolloquial, affectionate
妻子qī ziwifeformal, written
老婆lǎo powifecolloquial, affectionate
男朋友nán péng youboyfriendneutral
女朋友nǚ péng yougirlfriendneutral
未婚夫wèi hūn fūfiancéliterally "not-yet-married husband"
未婚妻wèi hūn qīfiancéeliterally "not-yet-married wife"
爱人ài rénspouse / partnerolder generations, gender-neutral

Marital status verbs

TermPinyinMeaning
结婚jié hūnget married
订婚dìng hūnget engaged
离婚lí hūndivorce
单身dān shēnsingle
恋爱liàn àibe in a relationship (verb)

In-laws — another side split

The term depends on whose parents you mean. Four for the common cases:

TermPinyinExact relation
岳父yuè fùwife's father (husband's perspective)
岳母yuè mǔwife's mother (husband's perspective)
公公gōng gonghusband's father (wife's perspective)
婆婆pó pohusband's mother (wife's perspective)
Direction matters. English "mother-in-law" is symmetric. Chinese isn't: a husband calls his wife's mother 岳母; a wife calls her husband's mother 婆婆. The words encode who married into which household.

5. Children & descendants

Grandchildren inherit the side-marker. Via a son: bare term. Via a daughter: prefix.

descendants(through) via son: 孙子 / 孙女 · via daughter: 外孙 / 外孙女
TermPinyinExact relation
孙子sūn zigrandson (son's son)
孙女sūn nǚgranddaughter (son's daughter)
外孙wài sūngrandson (daughter's son)
外孙女wài sūn nǚgranddaughter (daughter's daughter)

6. Question patterns

Canonical family questions. Learn as whole phrases — they recur verbatim.

QuestionPinyinMeaning
你家有几口人?nǐ jiā yǒu jǐ kǒu rén?How many in your family? (口 = classifier for household people)
你有兄弟姐妹吗?nǐ yǒu xiōngdì jiěmèi ma?Do you have siblings?
你是老几?nǐ shì lǎo jǐ?Where in the birth order? (lit. "you are elder-which?")
你结婚了吗?nǐ jié hūn le ma?Are you married? (了 marks a completed state)
你有孩子吗?nǐ yǒu háizi ma?Do you have kids?
你父母还健在吗?nǐ fùmǔ hái jiànzài ma?Are your parents still living? (polite)

Birth-order answers: 我是老大 (lǎo dà, "oldest"), 我是老二 (lǎo èr, "second"), 我是老小 (lǎo xiǎo, "youngest"). Only children say 我是独生子 (male) or 我是独生女 (female).

7. Sample dialogs

Dialog 1 — meeting someone, asking about siblings
A
你 家 有 几 口 人?
nǐ jiā yǒu jǐ kǒu rén?
How many people are in your family?
B
我 家 有 五 口 人:爸爸妈妈哥哥妹妹 和 我。
wǒ jiā yǒu wǔ kǒu rén: bàba, māma, gēge, mèimei, hé wǒ.
Five — dad, mom, older brother, younger sister, and me.
A
那 你 是 老 几?
nà nǐ shì lǎo jǐ?
So where are you in the birth order?
B
我 是 老二,哥哥 大 我 三 岁。
wǒ shì lǎo èr, gēge dà wǒ sān suì.
I'm the second; my older brother is three years older than me.
Dialog 2 — introducing a spouse at an event
A
来,我 给 你 介绍 一下,这 是 我 老婆小雨
lái, wǒ gěi nǐ jièshào yíxià, zhè shì wǒ lǎopo, Xiǎo Yǔ.
Let me introduce you — this is my wife, Xiao Yu. (给…介绍 = "introduce to")
B
你好!久 闻 大 名。你们 结婚 多 久 了?
nǐ hǎo! jiǔ wén dà míng. nǐmen jiéhūn duō jiǔ le?
Hello! I've heard so much about you. How long have you been married?
A
我们 结婚 三 年 了,女儿 去年 出生。
wǒmen jiéhūn sān nián le, nǚ'ér qùnián chūshēng.
Three years now — our daughter was born last year. (出生 = born)
Dialog 3 — parents' siblings (using the type-safe terms)
A
爸爸 有 几 个 兄弟 姐妹?
nǐ bàba yǒu jǐ gè xiōngdì jiěmèi?
How many siblings does your dad have?
B
他 有 一 个 哥哥 和 一 个 妹妹,所以 我 有 伯伯姑姑
tā yǒu yí gè gēge hé yí gè mèimei, suǒyǐ wǒ yǒu bóbo hé gūgu.
He has an older brother and a younger sister — so I have a 伯伯 and a 姑姑. (所以 = so)
A
那 你 妈妈 那 边 呢?
nà nǐ māma nà biān ne?
And what about your mom's side? (那边 = "that side", 呢 = turn-back particle)
B
妈妈 有 一 个 弟弟,是 我 舅舅。他 还 有 两 个 表妹
wǒ māma yǒu yí gè dìdi, shì wǒ jiùjiu. tā hái yǒu liǎng gè biǎomèi.
My mom has a younger brother — he's my 舅舅. He also has two younger female cousins (from mom's side).

8. Edge cases

哥 / 姐 as honorifics for strangers

Chinese addresses strangers as if they were family of the matching age and gender. Calling a slightly older man or woman is common between customers and shopkeepers, drivers and passengers. A politeness mechanism, not a claim about actual kinship.

In some regions, 美女 (měinǚ, "beauty") gets a young woman's attention; 帅哥 (shuàigē) is the mirror image. Neither is romantic — closer to "ma'am" and "sir" than to a pickup line.

叔叔 / 阿姨 for any adult of parents' age

Children address unrelated adults of their parents' generation as 叔叔 or 阿姨. The neighbor you've never met is 叔叔; the woman running the corner shop is 阿姨. Persists into adulthood as a polite default for anyone a generation up.

独生子女 — the only-child generation

独生子女 (dúshēng zǐnǚ, "single-birth sons-and-daughters") labels the cohort born under the one-child policy (roughly 1980–2015) — an entire generation with no 哥哥, 姐姐, 弟弟, or 妹妹. When someone in their thirties says 我没有兄弟姐妹, this label is the context.

The generic fallback: 亲戚

When the relation is remote or you'd rather not enumerate, 亲戚 (qīnqi) is the all-purpose word for "relative." 他 是 我 的 亲戚 closes off further questions politely. It's the Object at the top of the kinship hierarchy: accepts anything, tells you nothing.

Address by relation, not by name

You don't call older relatives by their given names. You use the relation, with an optional position number: 大伯 ("oldest paternal uncle"), 二叔 ("second youngest-paternal-uncle"), 三姨 ("third maternal-aunt"). Using a first name on your father's older brother reads as rude. Younger relatives and peers get names; older ones get titles.

9. Next steps

Once the tree is in your head, the rest is pattern-matching: locate the node, produce the right term. When you can distinguish 伯伯 from 叔叔 from 舅舅 without hesitation, you've internalized the single biggest structural difference between English and Chinese kinship — and passed a test many native speakers' children fail.