Learn Spanish (Latin America): Capaz que no acierte la respuesta correcta.

While capaz de means 'capable of', the phrase capaz que (or just capaz) is a very common colloquial expression in much of Latin America meaning 'maybe' or 'perhaps'. It works just like a lo mejor or tal vez.

Why use acierte in the subjunctive here instead of the indicative?

The phrase capaz que expresses doubt. Just like with tal vez or quizás, using the subjunctive (acierte) emphasizes a higher level of doubt. In everyday Latin American Spanish, you can also use the indicative (acierto) after capaz que if you feel the outcome is more likely.

Why use acertar for 'guess' instead of adivinar?

Adivinar is the general action of guessing. Acertar goes a step further: it means 'to guess correctly', 'to get it right', or 'to hit the target'. The speaker isn't just saying they won't make a guess; they are saying they might not get the answer right.

Why does acertar become acierte here?