It is the basic unit of language and minimal free form which has given sound and meaning and syntactic function.
Classification of English words
Parts of speech
Noun
Pronoun
Adjective
Verb
Adverb
Preposition
Conjunction
Interjection
Article
Membership
Open-class word
The words are infinite or unlimited.(eg. nouns,verbs,adjectives,adverbs)
Closed-class word
The words are fixed or limited.(eg. pronous,prepositions,conjunctions,articles)
Meaning expressed
Grammatical words
The words express grammatical meanings.(eg. conjunctions,prepostions,articles,pronouns)
Lexical words
The words have lexical meanings that is those refer to substance,action,and quality.(eg. nouns, verbs,adjectives,adverbs.)
Variability
variable words
The words have grammatically different words forms.(eg. nouns,verbs)
invariable words
The words which do not have inffective endings.(eg. adjectives,adverbs,interjections etc.)
Origin
Native words
The words are of Anglo-Saxon origin.
Borrowed words
The words borrowed from other language.
Usage
Literary words
The words are mainly used on formal occasion,esp. in writing.
Colloquial words
The words are mainly used in spoken language
Slang words
The words are highly colloquial, vigorous and invented for specific occasions or uses.
Technical words
The words are used in various special fields such as in art , trade ,sports,scientific fields,etc
Definition of Lexicology
Sourse
Greek morphemes
lexikos"of or for words"
-logia"the study of"
Definition
It is the study of words.
Related disciplines
Liguistios
It is a branch of Linguistics dealing with the vocabulary of a language and the properties of words as the main units of language.
Morphology
It is a branch of linguistius which which studies the internal structure of words and rules by which words.
Etymology
It is the study of the origins and history of the form and meaning of words.
Semantics
It is the study of meaning of different linguisitic levels,words,sytax,wtlerance,discourse,etc.
Stylistics
It is the study of style.It is concerned with the users' choice of Linguistic elements(lexi,phonogy,syntax) in a particular context for special effects.