English Reference

Word

irritability

Phoneticsir·ri·tabil·i·ty

US/ˌɪɹɪtəˈbɪɫəti/

UK/ˌɪɹɪtəbˈɪlɪti/

Uncountable noun

Definition

n. a feeling of being easily annoyed or upset. You might feel this way when you are tired, hungry, or in pain.

n. a state of being easily annoyed or provoked to anger. Often associated with physiological states such as fatigue, hunger, or hormonal changes.

Examples

“She felt a lot of irritability after not sleeping well.”

“The doctor noted that the patient's irritability was likely a side effect of the new medication.”

“Chronic sleep deprivation can lead to a significant increase in irritability, making it difficult for individuals to maintain social composure or perform complex cognitive tasks.”

Examples

simple

“She felt a lot of irritability after not sleeping well.”

contextual

“The doctor noted that the patient's irritability was likely a side effect of the new medication.”

complex

“Chronic sleep deprivation can lead to a significant increase in irritability, making it difficult for individuals to maintain social composure or perform complex cognitive tasks.”

Real-World Examples

“In turn, this can cause poor sleep, irritability and decision fatigue, she says.”
BBC News 5 Sept 2026
“They may have noticeable academic and attention challenges that reflect their anxiety, irritability or restlessness adjusting to reduced phone access.”
The Conversation 6 Jul 2026

Etymology

From Latin irritabilitās, equivalent to irritable + -ity.

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

Word family

NOUN

irritability(B2)

ADJECTIVE

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
Occasional
Level
B2 · Upper Intermediate
Updated

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