English Reference

Word

viper

Phoneticsviper

US/ˈvaɪpɝ/

UK/vˈaɪpɐ/

Countable noun

Definition

n. a type of poisonous snake with long teeth. You can also use this word to describe a person who is mean or tries to hurt others secretly.

n. a venomous snake belonging to the family Viperidae, characterised by long, hinged fangs. Figuratively describes a person perceived as treacherous, malicious, or spiteful.

Examples

“The hiker saw a viper hiding in the tall grass.”

“He warned his colleagues that the new manager was a viper who would betray them to get a promotion.”

“The protagonist soon realised that the court was filled with vipers, each waiting for a moment of weakness to strike at his reputation.”

Examples

simple

“The hiker saw a viper hiding in the tall grass.”

contextual

“He warned his colleagues that the new manager was a viper who would betray them to get a promotion.”

complex

“The protagonist soon realised that the court was filled with vipers, each waiting for a moment of weakness to strike at his reputation.”

Usage

When used figuratively for a person, it carries a strong negative connotation of betrayal.

Real-World Examples

“And yes, they really did stage confrontations with 75 venomous pit vipers in the lab, stepping on the head, mid-body, and tail while wearing safety boots, as well as merely stepping near the snakes.”
Ars Technica 3 Sept 2026
“Venomous snakes such as vipers, on the other hand, were rarely caught," explains Lev.”
Phys.org 20 Aug 2026

Idioms

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.C2 ProficiencyIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.8.5–9.0TOEFL 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: 6.0114–120
Frequency
Frequent
Level
C2 · Proficiency
Updated

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