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/ˌfʌndəˈmentəli/ · fun.da.men.tal.ly

adverb

In a fundamental or basic sense; reaching the very core of the matter. She fundamentally disagreed with the new policy, feeling it went against the company's core values.
Essentially or primarily; in the most basic or underlying way. The new technology fundamentally changed the way we communicate with each other.

Synonyms

basically essentially primarily essentially in essence at its core in the basics

Antonyms

superficially peripherally marginally externally externally on the surface

Did you know? The word 'fundamentally' is often used in philosophical and scientific discussions to describe the underlying principles or laws that govern a particular phenomenon.

Related terms

essence core basis foundation principle underlying fundamental

Written by Lexi Wordsworth, Dictionary Editor 0 lookups Added Jul 17, 2026