This episode provides an introduction to morphology and word formation in the English language. It explains fundamental concepts such as morphemes, including their types (root, derivational, inflectional, free, bound) and variations (allomorphs), and distinguishes them from words. The episode covers English inflectional and derivational morphology, detailing common affixes and processes like compounding, coining, abbreviation, blending, and borrowing. Furthermore, it touches upon how words are affected by the register, their internal structure, and methods for classifying words based on their morphological properties.