afición
hobby
affection
fondness, liking
+
-ción
noun suffix
Afición means hobby and can be thought of as affection0 (fondness0) + -ción1 (noun1), implying a fondness or liking turned into a noun (i.e., a hobby).
noun
- hobbyA strong interest or hobbySu afición por la fotografía comenzó en la universidad. // His hobby of photography began in college.