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

What has yet to be determined is whether, just like Hawking radiation means that black holes will eventually evaporate, this form of cosmic radiation will fundamentally cause our Universe’s dark energy to decay away, too. —Ethan Siegel, Big Think, 25 Sep. 2025

While direct comparisons are difficult due to different test conditions, materials, and baseline designs, these studies suggest the field is exploring fundamentally different architectural approaches alongside incremental flow field optimization. —Tejasri Gururaj, Interesting Engineering, 25 Sep. 2025

His open disdain for capitalism is fundamentally at odds with the very DNA of New York — the beating heart of American capitalism. —John Foley, Fortune, 24 Sep. 2025

Entertainment, media and sports brands continue to dominate our rankings because their consumers are fundamentally different. —Kanika Talwar, Footwear News, 24 Sep. 2025

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