Antonyms are 2 or more words of the same language belonging to the same part of speech and to the same semantic field identical in style and nearly identical in distribution associated and often used together so that their contradictory or contrary notions.
Semantic criteria:
1 Contradictories are mutually opposed and defying one another. To use one of the terms is to contradict the other and to use not before one of them is to make it equivalent to the other. Among contradictories there is a subgroup of words of the type: young — old; big — small etc. The difference between these and the antonymic pairs described above lies in the fact that is to say not young is not to say old. In fact such terms dont represent absolute values.
2 Contraries proper are mutually opposed but they are gradable. Cold — hot with intermediate cool — warm. Both pairs are quite synonymous to each other.
3 Incompatibles. In other words as the relation of exclusion — not contradiction. To say morning is to say not afternoon, not night. John Lions suggest a different terminology. He distinguishes antonyms proper = contraries; complimentary antonyms = contradictories.
Morphological approach: rootabsolute antonyms: right — wrong; derivational antonyms characterized by the presence of negative prefixes: happy — unhappy.
The regular type of derivative antonyms contains negative prefixes: dis; il; im; in; ir; non; un. Unlike synonyms antonyms dont differ either in style, emotional colouring or distribution. They are interchangeable at least in some contexts. As antonyms dont differ stylistically an antonymic substitution never results in the change of stylistic colouring. In dealing with antonymic opposition it may be helpful to treat antonyms in terms of marked and unmarked members. In the antonym pair old — young the unmarked member is old, because it is possible to ask How old is the girl without implying that she is no longer young. This unmarked member old is used more often than young. Not only words but set-expressions as well can be grouped into antonymic pairs. e.g.: by accident — on purpose. Antonyms form mostly pairs — not groups like synonyms. Polysemantic words may have antonyms in some of their meanings and have none in the others. Also in different meanings a word may have different antonyms.
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Antonymy in general shares many features typical of synonymy. Like synonyms, perfect or complete antonyms are fairly rare.
It is usual to find the relations of antonymy restricted to certain contexts. Thus thick is only one of the antonyms of thin (a thin slice—a thick slice), another is fat (a thin man—a fat man).
The definition of antonyms as words characterised by semantic polarity or opposite meaning is open to criticism on the points discussed already in connection with synonymy. It is also evident that the term opposite meaning is rather vague and allows of essentially different interpretation.
If we compare the meaning of the words kind — ‘gentle, friendly, showing love, sympathy or thought for others’ and cruel — ‘taking pleasure in giving pain to others, without mercy’, we see that they denote concepts that are felt as completely opposed to each other. Comparing the adjective kind and unkind we do not find any polarity of meaning as here semantic opposition is confined to simple negation. Unkind may be interpreted as not kind which does not necessarily mean cruel, just as not beautiful does not necessarily mean ugly.
It is more or less universally recognised that among the cases that are traditionally described as antonyms there are at least the following four groups.1
1. Contradictories which represent the type of semantic relations that exist between pairs like dead and alive, single and married, perfect and imperfect, etc.
To use one of the terms is to contradict the other and to use not before one of them is to make it semantically equivalent to the other, cf. not dead=alive, not single=married.
Among contradictories we find a subgroup of words of the type young — old, big — small, and so on. The difference between these and the antonymic pairs described above lies in the fact that to say not young is not necessarily to say old. In fact terms like young and old, big and small or few and many do not represent absolute values. To use one of the terms is to imply comparison with some norm: young means ‘relatively young’. We can say She is young but she is older than her sister. To be older does not mean ‘to be old’.
It is also usual for one member of each pair to always function as the unmarked or generic term for the common quality involved in both members: age, size, etc.
This generalised denotational meaning comes to the fore in certain contexts. When we ask How old is the baby? we do not imply that the baby is old. The question How big is it? may be answered by It is very big or It is very small.
It is of interest to note that quality nouns such as length, breadth, width, thickness, etc. also are generic, i.e. they cover the entire measurement range while the corresponding antonymous nouns shortness, narrowness, thinness apply only to one of the extremes.
2. Contraries differ from contradictories mainly because contradictories admit of no possibility between them. One is either single or married, either dead or alive, etc. whereas contraries admit such possibilities. This may be observed in cold — hot, and cool and warm which seem to be intermediate members. Thus we may regard as antonyms not only cold and hot but also cold and warm.
Contraries may be opposed to each other by the absence or presence of one of the components of meaning like sex or age. This can be illustrated by such pairs as man — woman, man — boy.
3. Incompatibles. Semantic relations of incompatibility exist among the antonyms with the common component of meaning and may be described as the reverse of hyponymy, i.e. as the relations of exclusion but not of contradiction. To say morning is to say not afternoon, not evening, not night. The negation of one member of this set however does not imply semantic equivalence with the other but excludes the possibility of the other words of this set. A relation of incompatibility may be observed between colour terms since the choice of red, e.g., entails the exclusion of black, blue, yellow and so on. Naturally not all colour terms are incompatible. Semantic relations between scarlet and red are those of hyponymy.
We know that polysemy may be analysed through synonymy. For example, different meaning of the polysemantic word handsome can be singled out by means of synonymic substitution a handsome man—a beautiful man; but a handsome reward—a generous reward. In some cases polysemy may be also analysed through antonymy (e.g. a handsome man—an ugly man, a handsome reward—an insufficient reward, etc.). This is naturally not to say that the number of meanings of a polysemantic word is equal to the number of its antonyms. Not all words or all meanings have antonyms (e.g. table, book, etc. have no antonyms). In some cases, however, antonymy and synonymy serve to differentiate the meanings as in the word handsome discussed above. Interchangeability in certain contexts analysed in connection with synonyms is typical of antonyms as well. In a context where one member of the antonymous pair can be used, it is, as a rule, interchangeable with the other member. For instance, if we take the words dry and wet to be antonymous, they must be interchangeable in the same context (e.g. a wet shirt—a dry shirt). This is not to imply that the same antonyms are interchangeable in all contexts. It was pointed out above that antonyms that belong to the group of contraries are found in various antonymic pairs. Thus, for instance there are many antonyms of dry — damp, wet, moist, etc.
The interchangeability of each of them with dry is confined to certain contexts. In contrast to dry air we select damp air and in contrast to dry lips—we would probably use moist lips.
It is therefore suggested that the term "antonyms" should be used as a general term to describe words different in sound-form and characterised by different types of semantic contrast of denotational meaning and interchangeability at least in some contexts.
