barf is feminine, and adjectives mutate after feminine nouns. Look in the notes for an explanation and examples.
Okay I knew about the feminine mutation but really didn't expect a beard to be feminine!
There's also no notes for this section, Describe1
The mutation of adjectives after feminine nouns is first mentioned in the notes for 'Animals', I think. We can repeat it here, though - good idea.
No that's okay I knew that, just thought you were referring to notes for this chapter.
Yes, there are a few nouns like this that you think would be essentially masculine but are feminine instead. In this case barf comes from Latin barba, where the final -a is your clue that it's feminine, just like in modern-day Italian, Spanish, Portuguese etc.
As a bearded chap, I am insulted that the Welsh describe beards as "barf" !