This document summarizes key concepts in word study, including: - Words can be analyzed phonologically, graphologically, grammatically, and lexically. - A word is a grammatical unit identified by morphology and syntax, while a lexeme is an identifiable semantic unit. - Words have lexical categories like simple, compound, complex that influence their meaning and grammatical forms. - The meaning of a word is understood through its content, significance, and paradigmatic/syntagmatic relationships. - Componential analysis represents a word's components as labels like HUMAN, MALE, MARRIED to define its sense. - Semantic components influence grammatical choices in a word through