know-why

noun

plural know-whys

: understanding of the reasons underlying something (as a course of action)

our frontier past and our industrialized present both incline us toward a preoccupation with technique, with know-how rather than know-why

—Dwight Macdonald

Word History

Etymology

from the phrase know why

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now