I've received several explanations for the Esperanto -n, but I still don't entirely understand it.
Could anyone simply explain it to me? (Not stupidly simply, just without using "preposition" and "infinitive" and such--I do vaguely understand what those mean, I just need a very clear explanation for once.)
I may be a bit late, but I still wanted to help. -n is the suffix used to denote a direct object. The simplest way to explain this is that it is the noun that the verb is applied to. So, in English, to find the direct object of a transitive verb (just a verb that has a direct object), then say the subject followed by the verb, then add what or whom. If a word in the sentence answers this question, then that word is the direct object.
Take the following sentence: Mi donas al vi la verdan pomon. Or in English: I give you the green apple.
I (subject) give (verb) what? Apple. Apple is the direct object. Therefore, -n is used on the word pomon.
However, you'll also notice that -n also applies to adjectives describing the direct object. Be careful about this. It trips up a lot of people.
Here's a link to an article that I found really helpful and comprehensible: https://anthroyogini.wordpress.com/2014/01/29/learning-esperanto-accusative-case-and-that-pesky-n/