Fundamental
Definition
(n) : a basic or essential rule or principle.
Example
"(adj) : Water is fundamental for life."
"(adj) : Respect and trust are the fundamental parts of any strong friendship or relationship."
"(n) : Love is a fundamental of humanity, guiding kindness, understanding, and respect among people across all cultures and generations."
Explanation
Fundamental means something basic, necessary, or very important. It is the foundation or base on which other things depend. For example, “Honesty is a fundamental value in good relationships.” In learning, reading and writing are fundamental skills. It can also mean something essential or core in a system or idea: if it is missing, the system won’t work well. For example, “Love is a fundamental of humanity.” A fundamental change means a deep or complete change in something.