English Reference

Word

potency

Phoneticspo·ten·cy, stress on the first syllable

US/ˈpoʊtənsi/

UK/pˈəʊtənsi/

Countable & uncountable

Definition

n. the power or strength of something, like a medicine or a person's influence. It describes how effective or strong a thing is.

n. the inherent capacity or power to produce a desired effect; the strength or efficacy of a substance or argument.

Examples

“The medicine lost its potency after the expiration date.”

“Doctors were surprised by the potency of the new drug, as it required a much smaller dose than previous versions.”

“The political speech gained potency not from its volume, but from the speaker's ability to articulate the shared frustrations of the working class.”

Examples

simple

“The medicine lost its potency after the expiration date.”

contextual

“Doctors were surprised by the potency of the new drug, as it required a much smaller dose than previous versions.”

complex

“The political speech gained potency not from its volume, but from the speaker's ability to articulate the shared frustrations of the working class.”

Usage

Uncountable when referring to the general quality of strength; countable when referring to specific levels or types of power.

Real-World Examples

“A homemade brew has no standard dose, and potency varies from cactus to cactus.”
The Conversation 8 Sept 2026
“The science has become more complicated, however, as cannabis use has become more widespread and the potency of cannabis products has increased in many parts of the world.”
BBC News 15 Aug 2026

Etymology

Borrowed from Latin potentia. Doublet of Potenza.

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

Word family

NOUN

potency(C1)

ADJECTIVE

Domain

Mathematics

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