It means "end"
Fin is the Spanish word for "End" as in "The End" at the end of a movie. The Spanish word for Fin as in the fin on a Fish or an airplane is "Aleta"
"Fin de semana" in Spanish means "weekend" in English.
Al fin.
"El fin" translates to "the aim/end" in English.
If you mean a fin like a fish fin, there is a word, but mostlly each one is different; Lā (fin). Anal fin, kuaalo. Caudal fin, hiʻu. Dorsal fin, kualā. Pectoral fin, etc. If you mean fin, like 'the end', it is pau'ana.
the side of a plane
It's pronounced feen, rhymes with teen.
Weeks are semanas. The weekend is el fin de semana.
There is no root word fine. The root word could be fin which means end.
dog
There is no root word fine. The root word could be fin which means end.
afuras is not a spanish word.