Answers for the 4th seminar Word formation in Modern English

3.Derivation (affixation).
Derivational affixes serve to supply the stem with components of lexical and lexico-grammatical meaning, and thus form4different words. One and the same lexico-grammatical meaning of the affix is sometimes accompanied by different combinations of various lexical meanings. Thus, the lexico-grammatical meaning supplied by the suffix -y consists in the ability to express the qualitative idea peculiar to adjectives and creates adjectives from noun stems. The words containing derivational affixes can be substituted by morphologically different words, so that the derivative valiant can be substituted by a root word like brave. In a statement like I wash my hands of the whole affair (Du Maurier) the word affair may be replaced by the derivative business or by the simple word thing because their distributional properties are the same.
4.Derivational and functional affixes.
A derivational affix is an affix by means of which one word is formed (derived) from another. The derived word is often of a different word class from the original.
Additionally to number, inflectional affixes give grammatical information in terms of tense, case and gender. Derivational affixes, in contrast, are capable of creating a new lexeme from a base. Therefore, they can provide a more complex change.
Such an affix usually applies to words of one lexical category (part of speech) and changes them into words of another such category. For example, one effect of the English derivational suffix -ly is to change an adjective into an adverb (slow → slowly).
5.Prefixion.The notion of prefixation.
Prefixation is the formation of words with the help of prefixes. The interpretation of the terms prefix and prefixation now firmly rooted in linguistic literature has undergone a certain evolution. For instance, some time ago there were linguists who treated prefixation as part of word-composition (or compounding). The greater semantic independence of prefixes as compared with suffixes led the linguists to identify prefixes with the first component part of a compound word.H. Marchand, for instance, analyses words like to overdo, to underestimate as compound verbs, the first components of which are locative particles, not prefixes. In a similar way he interprets words like income, onlooker, outhouse profixes of the second type are qualified as semibound morphemes, which implies that they occur in speech in various utterances both as independent words and as derivational affixes, e.g. ‘over one’s head’, ‘over the river’ (cf. to overlap, to overpass); ‘to run out’, ‘to take smb out’ (cf. to outgrow, to outline); ‘to look up’, ‘hands up’ (cf. upstairs, to upset); ‘under the same roof, ‘to go under’ (cf. to underestimate, undercurrent), etc.