Learn Portuguese (Portugal): O destino surpreender-te-á, ou a astrologia está errada. - Destiny will surprise you, or astrology is wrong.

This is an example of mesoclisis, where a pronoun is placed inside the verb. It combines the infinitive surpreender (to surprise), the pronoun te (you), and the future tense ending á (for he/she/it).

Why can't I just put the pronoun at the end and say O destino surpreenderá-te?

In European Portuguese, you cannot attach a pronoun to the very end of a verb in the future or conditional tense. Because the sentence starts with a standard affirmative subject (O destino), the pronoun cannot jump before the verb either. The only option left is to split the verb and put the pronoun in the middle.

Where does the accent on the final á come from?

The normal future tense form is surpreenderá. When you split the verb to insert a pronoun, the final part keeps its original spelling and accent. The accent reminds you to stress that final syllable, just like you would if the pronoun wasn't there.

Why is it está errada and not é errada?

Being wrong is treated as a temporary state or a condition in Portuguese, so we use the verb estar rather than ser. Also notice that errada ends in an A because it is a feminine adjective agreeing with a astrologia.