This is the 2916th most frequent Dutch word.
aller
The Dutch word "aller" is a superlative intensifier meaning "of all" or "most," often used to emphasize the extreme degree of an adjective.
In this sentence, "aller" is being used as a superlative intensifier, emphasizing that this idea is the most outstanding of all.
Dit is het allerbeste idee dat ik ooit heb gehoord.
This is the very best idea I've ever heard.
In this case, "aller" is used to emphasize the degree of kindness, functioning as a total intensifier to amplify positivity in the statement.
Ze is allerliefst tegen haar vrienden.
She is extraordinarily kind to her friends.
Here, "allerhande" (a compound involving "aller") is used as a modifier to indicate a variety or diversity, meaning 'all kinds of' or 'various.'