orðaforðinn

Orðaforðinn is the term used in Icelandic linguistics to refer to the collection of words known and used by an individual or a speech community. In practice, it includes both receptive (passive) knowledge—words recognized in listening and reading—and productive (active) knowledge—words that can be readily used in speaking and writing. The size and composition of the orðaforðinn depend on factors such as age, education, reading habits, and bilingualism. In children, growth of the orðaforðinn is a core part of literacy development, with rapid expansion in early school years followed by gradual diversification of specialized vocabularies.

In research and pedagogy, the orðaforðinn is often estimated through vocabulary size measures, word frequency lists, and corpus-based analysis. Digital corpora and lexicographic projects in Icelandic support tracking of the orðaforðinn across genres and registers, informing dictionary entries and vocabulary teaching materials. The concept also intersects with language policy and literacy initiatives, since a robust orðaforðinn is associated with reading comprehension and effective communication.

While the exact boundaries of the orðaforðinn vary, it is commonly treated as a dynamic and context-dependent resource, expanding with reading, schooling, and exposure to language. See also: Lexicon, Vocabulary, Orðasafn, Icelandic language.