noun which may take the genitive case particle 'no', noun
long-standing; long-cherished; of many years
Used as a pre-nominal modifier (～の) to describe something that has existed or been felt for many years, such as a wish, problem, or relationship.
My long-cherished dream has finally come true.
This is a long-standing pending issue.
for years; over the years; for a long time
Adverbial use indicating that something has continued or been done over a period of years up to the present.
He has been living in this town for years.
Years of research have borne fruit.
He finally realized his long-cherished dream.
I haven't met him for the past five years.