why

English

/ʍaɪ/

adv
Definitions
  • For what cause, reason, or purpose (interrogative adverb).
  • For which cause, reason, or purpose (relative adverb).

Etymology

Inherited from Middle English why inherited from Old English hwȳ inherited from Proto-Germanic *hwī (with what, how, by what) derived from Proto-Indo-European *kʷey, *kʷ-.

Origin

Proto-Indo-European

*kʷ-

Gloss

Timeline

Distribution of cognates by language

Geogrpahic distribution of cognates

Cognates and derived terms