Dictionary.com
Thesaurus.com

WH-word

American  
[duhb-uhl-yoo-eych-wurd] / ˈdʌb əl yuˈeɪtʃˌwɜrd /
Or wh-word

noun

Grammar.

  1. an interrogative or relative word that usually, but not always, begins with wh-, as what, why, where, which, who, or how.

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.