English Reference

Word

reciprocal

Phoneticsre·cip·ro·cal, stress on the second syllable

US/ɹɪˈsɪpɹəkəɫ/

UK/ɹɪsˈɪpɹəkəl/

Definitions

01mutual or two-way

C1 · Advanced Formal

adj. describes a feeling or action that is shared by two people or groups; if you do something for someone, they do the same for you.

adj. describing a relationship, feeling, or action that is mutual and experienced or performed by each party toward the other.

“The two countries signed a reciprocal trade agreement to help both their economies.”

“Although they were competitors, there was a reciprocal respect between the two scientists that allowed for productive collaboration.”

Synonyms

mutualtwo-wayshared

Antonyms

one-sidedunilateral

02grammar

C2 · Proficiency Law Technical

adj. describes words like 'each other' that show two people are doing the same thing to one another.

adj. denoting a pronoun or verb that expresses a mutual action or relationship between the subject and the object.

“In the sentence 'They helped each other,' the phrase 'each other' is a reciprocal pronoun.”

“The linguist noted that the language lacks a distinct reciprocal verb form, relying instead on reflexive markers to convey mutual action.”

Synonyms

03mathematics

C1 · Advanced Countable noun Mathematics Technical

n. the number you get when you divide 1 by another number.

n. the mathematical value obtained by dividing one by a given quantity, or by inverting a fraction.

“The reciprocal of 2 is 0.5, and the reciprocal of 5 is 1/5.”

“To divide by a fraction, the student must first determine its reciprocal and then perform a multiplication.”

Synonyms

Real-World Examples

“On Monday, Trump's tariff threats to Canada's auto industry followed Carney declaring the country would counter his levies with reciprocal tariffs on US goods "dollar for dollar".”
BBC News 25 Aug 2026
“The attraction between the Paris-born 43-year-old and the camera tends to be reciprocal.”
The Guardian 28 Aug 2026

Etymology

From Latin reciprocus, possibly from a phrase such as reque proque (“back and forth, to and fro”), from re- (“back”), prō (“forwards”) and -que (“and”).

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

Word family

ADJECTIVE

reciprocal(C1)

Domains

GrammarMathematics

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.C1 AdvancedIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.7.0–8.0TOEFL 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: 5.0–5.595–113TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.945–990
Frequency
Frequent
Level
C1 · Advanced
Updated

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English Reference