The present set of lecture notes is designed to give lower-division students an introductory survey of English lexicology and morphology (i.e, the study of words and their internal structures). The text is divided into two parts. Part 1 em-phasizes the importance of the lexicon as an interface with syntax, semantics, morphology, and.phonology, and provides students with the necessary conceptual tools that will subsequently allow them to undertake and implement a formal analysis of lexemes and word-forms in English. Part 2, on the other hand, is devoted to the elucidation of a wide range of topics in English morphology, with special prominence given to affixation processes. Word-formation phenomena, such as compounding, blending, clipping, and acronomy, are also addressed in this part of the course book. In short, these notes offer an undergraduate-level introduction to the methods and principles of lexicological and morphological analysis, stressing both analytical skills and an appreciation for the complexity of the data.