1.Motivation 分类：onomatopoeic motivation拟声理据, morphological motivation形态理据, semantic motivation语义理据, etymological motivation词源理据.2. Types of meaning:grammatical ~ & lexical ~; conceptual ~& associative ~(connotative~, stylistic~, affective ~, collocative ~,)Associative meaning : 1) associative meaning is the secondary meaning supplemented to the conceptual meaning. 2)It differs from the conceptual meaning in that it is open-ended and indeterminated. 3)It is liable to the influence of such factors as culture , experience, religion, geographical region, class background,education, etc. 4)Associative meaning comprises four types : connotative, stylistic, affective, and collocative.3. Polysemy is a common feature peculiar to all natural language that one word has two or more senses or meanings. Diachronic approach is an approach to polysemy which studies how a word derived its different meanings from its primary meaning in the course of time.4.同形同音异义关系Homonymy is one of the features of words that a word is different in meaning fromanother, but either identical both in sound and spelling or identical only in sound or spelling with the other Homonyms generally fall into three classes: perfect homonyms (same name); homographs (same spelling) and homophones （some sound）. Perfect homonyms are those words identical both in sound and spelling, but different in meaning, e.g. bear /bea/ (n) a large heavy animal; bear /bea/ (v) to put up with. Homographs are the words identical only in spelling but different in sound and meaning, e.g. saw / / (v) to scatter seeds; sow /sau/ (n) female adult pig. Homophones refer to the words identical only in sound but different in spelling and meaning, e.g. dear /dia/ (n) a loved person;deer /dia/ (n) a kind of animal.5. 同形同音异义词与多义词的区别Perfect homonyms and polysemants are fully identical with regard to spelling and pronunciation. This creates the problem of differentiation. The fundamental difference between homonyms and polysemants lies in the fact that the former refers to different words which happen to share the same form and the latter is the one and same word which has several distinguishable meanings. One important criterion is to see their etymology, i.e. homonyms are from different sources whereas a polysemant is from the same source which has acquired different meanings in the course of development. The second principal consideration is semantic relatedness. The various meanings of a polysemant are correlated and connected to one central meaning to a greater or lesser degree, e. g. neck (See 6.1 Polysemy) . On the other hand, meanings of different homonyms have nothing to do with one another. In dictionaries, a polysemant has its meanings all listed under one headword whereas homonyms are listed as separate entries.6. 同义关系Synonyms are words which share the same or nearly the same meaning with each other but different in sound and spelling. There are absolute synonyms and relative synonyms which result from borrowing, dialects and regional English, figurative and euphemistic use of words, coincidence with idiomatic expressions. There exists the difference between or among synonyms in terms of their denotation, connotation or application. Absolute synonyms or complete synonyms are words which are identical in meaning in all its aspects. Relative synonyms or near-synonyms are similar or nearly the same in denotation, but embrace different shades of meaning or different degrees of a given quality. Sources of Synonyms1) Borrowing 2)Dialects and regional English 3) Figurative and euphemistic use of words 4) Coincidence with idiomatic expressions如何区分同义词？1Difference in denotation2 Difference in connotation 3 Difference in application7.What are the characteristics of antonyms?1) Antonyms are classified on the basis of semantic opposition 2) A word which has more than one meaning can have more than one antonym. 3) Antonyms differ in semantic inclusion. 4) Contrary terms are gradable antonyms, differing in degree of intenisty, so each has its own corresponding opposite.8.上下义关系:Hyponymy deals with the relationship of semantic inclusion. That is, the meaningof a more specific word is included in that of another more general word. Superordinates refer to some general words; subordinates denote those more specific words. Hyponymy can be described in terms of tree-like graphs, with higher-order superordinates above the lower subordinates. But their status either as superordinate or subordinate is relative to other terms. For example, horse, dog, pig are subordinates in relation to animal, but superordinates of mare, hound and boar, Animal itself becomes a subordinate of creature. And creature in turn becomes9.词义变化的种类There are five types of meaning, changes: extension, narrowing, degradation,elevation, and transfer among which extension and narrowing are the most common. Changes in meaning can be accounted for from extra-linguistic factors (historical reason, class reason, and psychological reason) and intra-linguistic factors (shortening, the influx of borrowing, and analogy).10.词义的扩大Extension is a process by which a word with a specialized sense is generalized to covera broader or less词义的缩小Narrowing is a process by which a word of wider meaning acquires a specialized sense；词义的升格Elevation is a process by which a word moves from a derogatory or neutral sense to a neutral and/or appreciative sense；词义的降格Degradation is a process by which a word of reputation slides into a pejorative use,；11.词义的转移Transfer is a process by which a word denoting one thing changes to refer to a differentbut related thing. Paper serves as an example. This word formerly denoted an African plant papyrus, which was once used to make paper. In modern times, paper is made from rags, wood, straw and the like, but the product has retained the same name. There is associated transfer. There are other kinds of transfer, such as, concrete to abstract, abstract to concrete and transfer of sensation. 12.语境的种类:非语言语境。