Lexicology

Lexicology is a subfield of linguistics focused on the words of a particular language. A word is the smallest unit of a language that can stand alone and carry meaning, though it may contain smaller parts called morphemes. Lexicology studies all aspects of a word—how it is formed, spelled, used, defined, and where it comes from—as well as the relationships between words. In linguistic terms, a language’s lexicon consists of lexemes, which are abstract units of meaning tied to a set of related word forms. Lexicology also examines how words can be broken down and looks for recurring patterns among them. This field is closely linked to lexicography, the practical work of creating dictionaries.

The word *lexicology* comes from Greek: *lexikon* (meaning “of or for words”), from *lexis* (“speech” or “word”), and *-logia* (“the study of”). Etymology, the study of word origins, is a key focus of lexicology. Because lexicology explores word meanings and semantic relationships, it often traces a word’s history and development. Etymologists use the comparative method, a set of techniques that reconstruct ancestral phonological, morphological, and syntactic features by comparing cognates across related languages. For example, many roots from different branches of the Indo-European family can be traced back to Proto-Indo-European. English has more borrowed words than native ones, such as *parkour* (French), *karaoke* (Japanese), *coconut* (Portuguese), and *mango* (Hindi). Much music terminology—*piano*, *solo*, *opera*—comes from Italian. Borrowed words can be classified by what linguistic element is taken: phonemes, morphemes, or semantics.

General lexicology studies words broadly, focusing on features common to all languages, like phonemes and morphemes. Special lexicology looks at what a specific language contributes to its vocabulary, such as its grammar. Lexicological studies can take two approaches, proposed by Swiss linguist Ferdinand de Saussure. Diachronic (or historical) lexicology examines how words and word-formation evolve over time, investigating a word’s origin and how its structure, meaning, and usage have changed. Synchronic (or descriptive) lexicology studies words within a fixed time frame—whether an early stage of the language, its current state, or any period in between. Lexicology also uses comparative and contrastive methods: comparative lexicology searches for shared features between two or more languages, while contrastive lexicology identifies differences that distinguish related and unrelated languages.

The subfield of semantics relevant to lexicology is lexical semantics, which considers word meanings through concepts like synonymy, antonymy, hyponymy, and polysemy. Semantic analysis may involve contextualizing words and addressing syntactic ambiguity. Related disciplines include semasiology and onomasiology. A word can have two kinds of meaning: grammatical and lexical. Grammatical meaning relates to a word’s function (e.g., tense or plurality), often shown by affixes. Lexical meaning is what the base word denotes, not limited to a single form. For instance, *walk*, *walks*, *walked*, and *walking* all share the same lexical meaning (“to move one’s feet at a regular pace”) but differ in grammatical meaning.

Lexicology also covers phraseology, the study of multi-word expressions or idioms, such as “raining cats and dogs.” The meaning of such a phrase differs from the individual words and is often unpredictable. Phraseology examines why these meanings exist and analyzes the rules governing word combinations. Idioms and other phraseological units can be classified by content or meaning, and they are difficult to translate word-for-word between languages.

Notable lexicologists include Dámaso Alonso (Spanish poet, critic, and philologist), Roland Barthes (French writer, critic, and semiotician), and Ghil’ad Zuckermann (Israeli linguist and language revivalist). Related topics include calque, computational lexicology, lexicostatistics, lexical semantics, lexical analysis, English lexicology and lexicography, and the Lexical Markup Framework. Relevant societies are the Association for Automatic Language Processing (ATALA) in Paris and the International Society for Historical Lexicography and Lexicology at the University of Leicester.