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English definition of “suffix”

suffix

noun [C]     /ˈsʌf.ɪks/
B2 a letter or group of letters added at the end of a word to make a new word: The suffix '- ness ' added to the end of the word ' sweet ' forms the word ' sweetness ', changing an adjective into a noun .Morphology and parts of words Grammar:SuffixesA suffix is a letter or group of letters added at the end of a word which makes a new word.Grammar:Suffixes: spellingOften, the suffix causes a spelling change to the original word. In the table above, the -e ending of complicate and create disappears when the -ion suffix is added. Other examples of spelling changes include:Grammar:Common suffixes and examplesGrammar:Word formationThere are four main kinds of word formation: prefixes, suffixes, conversion and compounds.Grammar:PrefixesWe add prefixes before the base or stem of a word.Grammar:SuffixesWe add suffixes after the base or stem of a word. The main purpose of a suffix is to show what class of word it is (e.g. noun or adjective).Grammar:ConversionConversion involves the change of a word from one word class to another. For example, the verbs to email and to microwave are formed from the nouns email and microwave:Grammar:CompoundingWhen we use compounding, we link together two or more bases to create a new word. Normally, the first item identifies a key feature of the second word. For example, the two bases back and ache can combine to form the compound noun backache, and the two bases post and card combine to form the compound noun postcard.Grammar:AbbreviationAbbreviation involves shortening a word. We do this in three main ways: clipping, acronyms and blends.Grammar:Back-formationWe form words with back-formation when we remove part of a word, usually something which we think is a suffix (or occasionally a prefix). We do this commonly when we form verbs from nouns.
(Definition of suffix noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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