chapter 1 lexicology and basic concepts of words and vocabulary 1.1 the definition of english lexicology 1.1.1 the domains of english lexicology 1.1.2 methods of study of lexicology 1.2 the definition of word 1.3 the definition of vocabulary 1.4 classification of words 1.4.1 full word and form word 1.4.2 popular word and learned word 1.4.3 abstract word and concrete word 1.4.4 transparent word and opaque word 1.4.5 polysemic word and monosemic word 1.4.6 native word and loan word exerciseschapter 2 the development of the english vocabulary 2.1 the world languages 2.2 language classifications 2.2.1 morphological classification 2.2.2 structural classification 2.3 the indo-european language family 2.4 the historical overview of english vocabulary 2.4.1 old english (450鈥斺€?150) 2.4.2 middle english (1150鈥斺€?500) 2.4.3 modern english (1500鈥斺€攗p to now) 2.5 three main sources of new words of the present-day englishvocabulary 2.5.1 the rapid development of modern science and te