appeler - to call
appeddare - to bark
Both verbs come from Latin "appellare" which had various meanings : to speak to someone, to call, to mention, to complain, to blame.
Apparently in French prevailed the meaning "to call"; while actual Sardinian meaning probably derives from "to complain". In a sense when the dog barks against someone it's complaining
for his presence / intrusion.
So if I say the phrase :
Su cane est appeddende = the dog is barking
I could also translate it as : the dog is complaining