Mam silnego kaca! Why is this genitive/dopełniacz?

I think you are using that term rather loosely. If a word, in its original form, is placed in a sentence and no change occurs, sure, it always must take some form and we have a list of names in Polish for each form, but to say it was actually declinated when the word remains exactly the same.....I don't know if I buy that.

I've never heard of the term "virile". Guess you learn something new every day.

Me too, until I tried to translate "męskożywotny" ;)
Maybe I'm using wrong English definition. If that is the case, maybe somebody here know what is the right translation of męskożywotny.


and I think the same about your usage of declination.
Even if some nouns have the same form in different cases, they are still declinated. In the case of "psy" you have to know the meaning of sentence to know which case was used: nominative or accusative. Then you can determine the role of word in sentence: subject or indirect object.

"masculine animate" would be the most sensible translation into English.

that makes sense.