This is the 4568th most frequent Dutch word.
dertigjarige
A "dertigjarige" is a "thirty-year-old" person.
Used as an adjective specifying age.
De dertigjarige man wandelde op het strand.
The thirty-year-old man walked on the beach.
Used as a noun referring to an individual.
Het schilderij van de dertigjarige is tentoongesteld in het museum.
The painting of the thirty-year-old is exhibited in the museum.
Used as an adjective describing an amount of time.