English Reference

Word

heartburn

Phoneticsheart·burn, stress on the first syllable

US/ˈhɑɹtˌbɝn/

UK/hˈɑːtbɜːn/

Definitions

01chest pain from acid

B1 · Intermediate Uncountable noun Medicine

n. a painful, burning feeling in your chest or throat that happens after eating, caused by stomach acid.

n. a burning sensation in the chest or throat caused by the reflux of gastric acid into the oesophagus.

“He often gets heartburn if he eats spicy food late at night.”

“The patient reported chronic heartburn that worsened when lying down, suggesting a possible issue with the lower oesophageal sphincter.”

Synonyms

indigestionacid refluxpyrosis

02annoyance or distress

C2 · Proficiency Uncountable noun Literary

n. a feeling of great worry, sadness, or annoyance about a situation.

n. a state of persistent irritation, resentment, or emotional distress regarding a specific issue.

“The new tax laws caused a lot of heartburn for small business owners.”

“The proposed merger caused considerable heartburn among the board members, who feared a loss of corporate identity.”

Synonyms

vexationgriefresentment

Etymology

From Middle English hertbryne, herte-bren (“lust", also "heartburn”, literally “heart burn”), equivalent to heart + burn. Compare also Middle English herte-brennyng (“anger, bitterness, heartburn”, literally “burning of/in the heart, heart-burning”). Compare also Ancient Greek καρδιαλγία (kardialgía), from καρδία (kardía, “heart”) + ἄλγος (álgos, “pain”). From being a burning sensation near the location of the heart in the chest.

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

Word family

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.B1 PreliminaryIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.4.0–5.0TOEFL 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: 3.0–3.544–71TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.550–784
Frequency
Occasional
Level
B1 · Intermediate
Updated

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