We had a lovely cat when I grew up, she was completely black, with short but compact fur, and tuffs on her ears.

For this to make sense, I need to talk about Swedish grammar...

In Swedish grammar we have two genus for words:

"Utrum" words get the suffix "(e)n" in their definitive form.

"Neutrum" words get the suffix "(e)t" in their definite form.

These words also get the en/ett article in front of it when talking about a signular unspecified item.

Example:

Car - bil, a car - en bil, the car - bilen

Table - bord, a table - ett bord, the table - bordet

Now, the Swedish word for cat is an utrum word:

Katt, en katt, katten.

One of the nicknames we used to call our cat was the neutrum defined form: "kattet".

Which if I am looking back at this comment is a funny nickname, with a stupidly complex explanation to non Swedish speakers.