fundamentally

adverb

fun·​da·​men·​tal·​ly ˌfən-də-ˈmen-tᵊl-ē 

: with regard to what is basic, essential, or fundamental : at a fundamental level

a fundamentally honest person

a fundamentally new/different approach

Most theories of the internal structure of Venus begin with the assumption that the planet is fundamentally similar to the earth …

—Andrew and Louise Young

: in a basic or fundamental manner

This "disposable" work force is the most important trend in business today, and it is fundamentally changing the relationship between Americans and their jobs.

—Janice Castro

Examples of fundamentally in a Sentence

Recent Examples on the Web

The three roles are looking at the same technology and seeing fundamentally different things. — Derya Matras, Fortune, 8 Oct. 2026

Gaunitz’s framing, that oral and topical ingredients have fundamentally different impacts, points toward combination regimens rather than either/or marketing. — Hanna Wickes, Kansas City Star, 7 Oct. 2026

UniFrance president Gilles Pélisson similarly warned that the rise of tech giants, streaming platforms and AI had fundamentally reshaped the balance of power facing European content producers. — Elsa Keslassy, Variety, 6 Oct. 2026

At the same time, medical experts say Kennedy’s vision of AI as a check against the medical establishment is fundamentally flawed. — ABC News, 6 Oct. 2026

Word History

First Known Use

15th century, in the meaning defined above

Rhymes for fundamentally

• accidentally
• detrimentally
• governmentally
• incidentally
• incrementally
• instrumentally
• sentimentally
• temperamentally
• coincidentally
• environmentally
• experimentally
• mentally