This is the 526th most frequent Danish word.
ejer
Owner.
Here, 'ejer' is used as a verb meaning 'own' in the present tense.
Jeg ejer en bil.
I own a car.
In this context, 'ejer' acts as a noun describing someone who owns something.
Han er ejer af dette firma.
He is the owner of this company.
Here, 'ejeren' is the definite form of the noun 'ejer,' specifying a particular owner.