Lexicology as a branch of linguistics studies the vocabulary of a language as a system of lexical units, primarily words. Another term for vocabulary is "word-stock", i.e. the word store, the sum total of words.
Traditionally, vocabulary units include words, e.g. dog, get, silly; morphemes, e.g. unfairly consists of the morphemes un-, -fair-, -ly; phraseological units, e.g. red tape, to break the ice.
The English vocabulary is enormous, it includes more than 600.000 words.
General lexicology is a part of general linguistics, it studies universal features of vocabularies of all or most languages,
Special lexicology is concerned with the vocabulary of a particular language,
e.g. Russian, English, French, etc.
Historical lexicology studies the origin and development of vocabulary as well as its separate units.
Descriptive lexicology deals with the vocabulary of a given language at a particular stage of its development,
e.g. lexicology of Modern English.
1.3. Lexicology is closely connected with other branches of linguistics, such as phonetics, grammar, stylistics, which also study words from various angles.
Lexicology is connected with Phonetics because the word is a two-facet unit which has both a form and meaning. Thus, the word can be defined as a series of sounds making up its form, and phonetics is concerned (among other things) with the study of the sound-form of words.
The link between phonetics and lexicology is based on the following:
(a) The recognition and understanding of a word is impossible without its proper pronunciation.
(b) The position of stress is used to distinguish words of identical sound-forms but different parts of speech,
e.g. 'rebel, n. - re'bel, v.; 'frequent, a. - fre'quent, v.
(c) Stress may also be used to distinguish between compound words and word groups made up of identical components,
e.g. a 'dark 'room (a phrase, each component has its own stress),
a 'dark-room (a compound, only one stress).
Lexicology is linked with Grammar because the word is used in speech as a grammatical unit, in certain grammatical forms and functions. Grammar studies means of expressing grammatical relations between words in speech and patterns after which words are combined into word-groups and sentences.
The connection between lexicology and grammar is seen in the following:
(a) Each word belongs to some part of speech and has characteristics typical of it.
(b) The grammatical form and function of a word may determine its lexical meaning,
e.g. brother - brothers "sons of the same parents", brethren "fellow members of a religious society, trade union, regiment, guild, order, etc."
(c) A grammatical form of a word may split off and acquire a new lexical meaning, becoming a new word. This is called lexicalization of grammatical forms,
e.g. arm - arms (pl) , arms "weapons"; developments "events".
(d) Words are divided into notional words and form words. A word in one meaning may function as a notional word and in another as a form word,
e.g. He looked indifferently at the food. He looked indifferent.
(e) The morpheme is the central unit of morphology, a branch of grammar, and also a unit of which words are built, thus studied also in lexicology.
(f) The system of all grammatical forms of a word is called its paradigm. The paradigm is used as a derivational means in conversion, one of the ways of word-building.
There is also a close link between lexicology and Stylistics. Stylistics is concerned with the study of stylistic devices, on the one hand, and functional styles, on the other. Stylistics studies meaning, synonymy, antonymy, etc. not as such, but for the purpose of analysing texts, the effect they produce on the reader, in order to help the reader grasp the author's message.
