EduardAlex, words in Korean, like words in English, obviously can have more than one syllable. In the words "brigand" or "Android", "and" doesn't mean the same thing in English as when those 3 letters stand alone in a separate word.
The same is true of '과" in Korean. And as Keyara points out, the word it is part of sometimes translates to "apple", and sometimes to "apology", depending on the situation and intention of the speaker or writer.
Also, when "과" is used to mean "and" or "with" it can link singular as well as plural nouns or pronouns.