English Reference

Word

ancestor

Phoneticsan·ces·tor, stress on the first syllable

US/ˈænˌsɛstɝ/

UK/ˈænsɛstɐ/

Definitions

01family history

B2 · Upper Intermediate Countable noun

n. a person in your family who lived a long time ago, such as a great-great-grandparent.

n. a person from whom one is descended, typically more remote than a grandparent.

“She discovered that one of her ancestors was a famous explorer in the 1800s.”

“Genetic testing revealed that his ancestors had migrated from Central Asia several centuries before settling in the coastal region.”

Synonyms

forebearprogenitorforefather

Antonyms

02earlier version

B2 · Upper Intermediate Countable noun Science

n. an early type of animal or machine that later versions developed from.

n. an earlier type of a species or a mechanical device that served as a precursor to modern forms.

“The small, three-toed horse is a distant ancestor of the modern horse.”

“The massive mainframe computers of the 1960s are the direct ancestors of the sleek laptops we use today.”

Antonyms

03linguistics

C1 · Advanced Countable noun Science Technical

n. a word from an old language that a modern word comes from.

n. a word or phrase in a parent language that serves as the etymological origin for a term in a daughter language.

“The Latin word 'pater' is the ancestor of the English word 'father'.”

“Linguists reconstructed the Proto-Indo-European ancestor of several modern European verbs to understand how the grammar evolved over millennia.”

Synonyms

etymonroot

Antonyms

04legal predecessor

C2 · Proficiency Countable noun Law Formal · Technical

n. the person who owned a property or land before the current owner inherited it.

n. the person from whom an estate or title has been derived by right of inheritance.

“The family could trace the ownership of the farm back to a single ancestor.”

“Under the current statutes, the rights of the heir are strictly tied to the contractual obligations left by the ancestor.”

Synonyms

Antonyms

05to be a forebear of

C2 · Proficiency Formal

v. to be the person or thing that someone or something else comes from.

v. to function as the progenitor or earlier version of a specific descendant.

“These ancient traditions ancestor many of the customs we still practice today.”

“It is theorised that a small population of flightless birds ancestored the diverse species now found across the archipelago.”

Usage

This verb is transitive and requires a direct object.

Synonyms

Antonyms

Collocations

Common phrases and expressions where native English speakers use the word “ancestor” in context.

Verb

01. honor one's ancestors

“Many cultures have specific festivals to honor their ancestors and seek their blessing.”

verb + possessive + noun

02. trace one's ancestors

“She spent months in the archives trying to trace her ancestors back to the 17th century.”

verb + possessive + noun

Adjective

03. common ancestor

“Humans and chimpanzees are believed to share a common ancestor from millions of years ago.”

adj + noun

04. direct ancestor

“He was proud to discover that a famous explorer was his direct ancestor.”

adj + noun

05. distant ancestor

“DNA testing revealed that he is related to a distant ancestor from Scandinavia.”

adj + noun

Noun

06. ancestor worship

“Ancestor worship is an important part of traditional religious life in many East Asian societies.”

noun + noun

07. ancestors of today's

Real-World Examples

“New research suggests that no matter what we eventually determine the last common ancestor of humans and chimpanzees to be, we'll learn it was a primate that climbed trees.”
Phys.org 17 Aug 2026
“Bacteria and archaea are the two kinds of prokaryotes on Earth, and their ancestors were the first organisms to evolve.”
Smithsonian Magazine 5 Aug 2026
“Scientists have long wondered how such complex caregiving behaviors evolved from ancestors that offered little or no care.”
ScienceDaily 1 Aug 2026
“One of the unknown groups, described by the researchers as a ghost ancestor, interbred with modern humans in Africa more than 50,000 years ago.”
ScienceDaily 1 Aug 2026

Etymology

From Middle English ancestre, auncestre, ancessour; the first forms from Old French ancestre (modern French ancêtre), from the Latin nominative antecessor (“one who goes before”); the last form from Old French ancessor, from Latin antecessōrem, accusative of antecessor, from antecēdō (“to go before”) + -tor (“-er”), from ante- (“before”) + cēdō (“to go”). See cede, and compare with antecessor.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Word family

NOUN

ancestor(B2)

ADJECTIVE

Domains

BiologyLawLinguistics

This entry

Exam level
CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.B2 FirstIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.5.5–6.5TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 4.0–4.572–94TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.785–944
Frequency
Frequent
Level
B2 · Upper IntermediateOxford
Updated

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