what

The word 'what' is a fundamental interrogative and relative pronoun in English, inherited directly from its Old English ancestor 'hwæt'. This Old English form is part of a larger family of Germanic interrogatives beginning with 'hw-', such as 'hwa' (who) and 'hwelc' (which). These can be traced back to the Proto-Indo-European root kʷo- or kʷi-, which was the foundation for interrogative and relative pronouns across many ancient languages, including Latin 'quod' and Greek 'τί' (tí). The semantic core of asking for the identification of an object or concept has remained remarkably stable through this long linguistic journey from Proto-Indo-European to modern English.