This is the 990th most frequent Finnish word.
alueiden
"Alueiden" means "of the areas" in English.
This sentence uses 'alueiden' in the possessive form, indicating 'of the areas'.
Alueiden kauneus on vertaansa vailla.
The beauty of the areas is unparalleled.
Here, 'alueiden' shows an attribute related to 'regions,' emphasizing their 'development'.
Tutkimuksessa analysoitiin alueiden kehitystä.
The study analyzed the development of the regions.
In this case, 'alueiden' specifies 'regions' with respect to their mutual interaction, 'cooperation between them'.