This is the 709th most frequent Danish word.
fylder
"Fylder" means "fills" or "occupies" in English.
The word 'fylder' here is used as a verb meaning 'to fill' or 'to occupy a container'.
Jeg fylder glasset med vand.
I fill the glass with water.
Here, 'fylder' is used metaphorically to convey the idea of 'taking up emotional or mental space'.
Hun føler, at diskussionen fylder for meget i hendes liv.
She feels that the discussion takes up too much space in her life.
In this context, 'fylder' indicates the measurement or extent of space occupied physically.