Learn Finnish: Tyttöystävä ei enää katso minua. - The girlfriend is no longer looking at me.

minua is the partitive form of minä (I or me). It is used here for two reasons: first, the verb katsoa (to look at) always requires its object to be in the partitive case. Second, negative sentences (using ei) also force their objects into the partitive.

Why is the verb katso missing a letter? Shouldn't it be katsoo for the third person?

In a positive sentence, it would be katsoo (she looks). However, in negative sentences, the negative verb ei does the heavy lifting, and the main verb gets stripped down to its basic stem form, which is just katso.

How do the words ei enää work together in this sentence?

The word enää means anymore. When you pair it with the negative verb ei (not), you get ei enää, which translates naturally to not anymore or no longer.

Is tyttöystävä a compound word?

Yes! It is made by directly combining tyttö (girl) and ystävä (friend). Finnish loves compound words and almost always writes them seamlessly as one single word.