English Reference

Word

nails

US/ˈneɪɫz/

UK/nˈeɪlz/

Definitions

01fingernails or toenails

A2 · Elementary Countable noun Medicine

n. the hard, flat parts that grow on the ends of your fingers and toes.

n. the horny, keratinous plates covering the dorsal surface of the distal phalanges of the fingers and toes.

“She painted her nails a bright red for the party on Saturday.”

“The doctor examined the patient's nails for signs of vitamin deficiency, noting the presence of small white spots and ridges.”

Synonyms

02metal fasteners

A2 · Elementary Countable noun

n. small, thin pieces of metal with a sharp point used to join wood together.

n. slender, pointed metal fasteners designed to be driven into wood or other materials by impact.

“He used a hammer and some nails to fix the broken fence.”

“The carpenter selected galvanized nails to prevent rusting, as the outdoor structure would be constantly exposed to coastal humidity.”

Synonyms

03to do something perfectly

B2 · Upper Intermediate Informal

v. to do something successfully or perfectly.

v. to perform a task with complete success or precision. Transitive — requires a direct object.

“She really nails that high note at the end of the song.”

“If the gymnast nails her landing during the final rotation, she is almost guaranteed to secure the gold medal.”

Synonyms

Antonyms

failbotch

04very tough

C1 · Advanced British English · Slang

adj. extremely tough, hard, or determined.

adj. possessing extreme physical or mental toughness; often used as a shortened form of the idiom 'hard as nails'.

“Don't mess with the new coach; she's absolutely nails.”

“The local defenders are known for being nails, rarely conceding a goal even when facing the league's most aggressive strikers.”

Teaching tip

This adjectival use is specifically British slang; in American English, speakers would almost always use the full phrase 'hard as nails'.

Antonyms

Real-World Examples

“She is glamorous with bobbed blond hair, gleaming nails and a trendy red trouser suit.”
The Guardian 13 Aug 2026
“Sprinter Amy Hunt has been showing off her nails at the European Athletics Championships in Birmingham.”
BBC News 14 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.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
Common
Level
C1 · Advanced
Updated

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English Reference