The meaning of words is analyzed in several different ways in order to account for as many aspects of meaning as possible. First of all, words are analyzed in terms of their semantic features that is basic elements which enable the differentiation of meaning of words.
Apart from the semantic features of words also semantic roles (sometimes called ‘thematic roles’) are examined. Semantic roles describe the way in which words are used in sentences and the functions they fulfill. Thus, the entity that performs an action is known as an agent, while the entity involved in an action is called the theme (or ‘patient). When an agent uses an entity in order to do something this entity is called an instrument. However, when a person in a sentence does not perform any action, but only has a perception, state of feeling then the role is described as experiencer. Finally there are roles connected with motion or position of entities. So, the location is where an entity is, the source is the initial position of the entity, the place where it moves from and the goal is where the entity moves to.
One other issue investigated by semantics is the relationship between words, some of which are known to almost every language user, others very abstract and vague for a common speaker. To begin with the simplest relationship between words let us have a look at synonymy. Synonyms are two words with very similar, almost identical meaning, such as buy and purchase, or cab and taxi. In some cases however, although the meaning seems nearly identical there is a difference in the word usage or the level of formality and therefore the words can not always be substituted.
The next relationship between words is the case when two words have opposite meanings, the words such as male/female, old/new, interesting/boring are antonyms. What is interesting is that antonyms are divided into gradable and non-gradable antonyms. Gradable antonyms are opposites along a scale in that when someone says ‘I am not high’ it does not necessarily mean ‘I am short’. Non-gradable antonyms do not present such flexibility: when we say ‘I am married’ the only antonym available in this sentence would be ‘I am single’.
Sometimes the meaning of one word is included in the meaning of another, broader term. Then the relationship between words can be described as hyponymy as in the case of words: vegetable andcarrot. A carrot is necessarily a vegetable, therefore the meaning of the word vegetable is included in the word carrot, so carrot is a hyponym of vegetable. In this relation the wordvegetable is the superordinte (higher level term) of the word carrot.
A very common word type in the English language is that of homophone. Homophones are words which have different written forms, but the same pronunciation such as: right/write, to/too/two, bear/bare. Homophones are often mistaken for homonyms, but homonyms are words which have the same written or spoken forms and unrelated meanings, as for example: bat (flying creature) andbat (used in baseball), race (contest) and race (ethnic group). Still when a word has multiple related meanings then linguists speak of polysemy as with head for instance: head as a part of body; mind, or mental ability; a person in charge.
Another interesting relation between words is that of metonymy which is based on close connection of certain entities in everyday experience. The connection can be that of container-content, whole-part, or others. It is clearly visible in the following example ‘he drank the whole bottle’ when it is obvious that he did not drink the container, but the content of the bottle.
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