fundamental
- Forming a necessary base or core; so central that everything else depends on it.
- As a noun (often plural), a basic principle or essential rule of a subject or system.
In a sentence
- A fundamental understanding of grammar is essential before attempting to write complex prose.
- The coach insisted that her players master the fundamentals of the game before focusing on advanced tactics.
Usage note. 'Fundamental' implies something without which the rest cannot stand, making it stronger than 'basic' or 'important'; reserve it for things that are genuinely foundational rather than merely significant.
Where it comes from
English fundamental · entered English early 15th c.
From Medieval Latin 'fundamentalis', derived from Latin 'fundamentum' meaning 'foundation or base', itself from 'fundare' (to found or lay a base), related to 'fundus' (bottom). The word entered English in the early 15th century, first in theological and philosophical contexts before broadening to general use.