English Reference

Word

suffix

Phoneticssuf·fix, stress on the first syllable

US/ˈsəfɪks/

UK/sˈʌfɪks/

Definitions

01grammar

B2 · Upper Intermediate Countable noun Law Technical

n. a letter or group of letters added to the end of a word to change its meaning or its part of speech.

n. an affix which is placed after the stem of a word. It can be derivational, changing the word class, or inflectional, indicating grammatical features like tense or number.

“In the word 'happiness', the suffix is '-ness', which turns the adjective into a noun.”

“The student struggled to identify whether the suffix was purely inflectional or if it altered the semantic core of the lexeme.”

Usage

Commonly used in linguistics and language learning to describe word formation.

Synonyms

Antonyms

02computing/math

C1 · Advanced Countable noun Computing Technical

n. a character or string of characters added to the end of a sequence.

n. a final segment or sequence of characters appended to a string, or a subscript used in mathematical notation.

“The file name has a '.txt' suffix so the computer knows it is a text document.”

“The algorithm identifies the longest common suffix between two strings to determine their structural similarity.”

Synonyms

appendagesubscript

Antonyms

Etymology

Borrowed from Latin suffīxus (“suffix”), from sub- (“under”) + fīxus (perfect passive participle of fīgere (“to fasten, fix”)), equivalent to sub- + -fix.

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

Domains

ComputingGrammarMathematics

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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