The word "word" originates from the Proto-Germanic wurda-, which itself stems from the Proto-Indo-European root werdh- meaning "to speak" or "to say." This ancient root is also the source for related terms in other Germanic languages, such as German "Wort" and Dutch "woord." The core semantic link from the PIE concept of verbal expression to the modern English meaning of a meaningful unit of language is direct and well-preserved. Over centuries, its usage expanded from the basic linguistic unit to encompass related concepts like a brief statement or a solemn promise.

The modern English word "word" is a simplex word derived from a single, tight Germanic root.