Latin:
* Magn-/Magni-: This is probably the most common and widely used root meaning "great," "large," or "important." Examples include "magnificent," "magnanimous," and "magnitude."
* Grand-/Grandi-: This root also means "great," often implying size or importance, but also can suggest something impressive or splendid. Examples include "grandiose" and "grandeur."
* Max-/Maxi-: This root means "greatest" or "largest," indicating the superlative. Examples include "maximum," "maximize," and "maximal."
Greek:
* Mega-: This prefix means "great," "large," or "million." Examples include "megaphone" and "megabyte."
* Macro-: This prefix means "large," "long," or "great," often referring to scale or scope. Examples include "macroscopic" and "macroeconomics."
It's important to note that the precise meaning of these roots can be influenced by the context in which they are used. They are not always interchangeable.