The word alistaste is the preterite form of alistar in the second person singular. There are other translations for this conjugation.
See the full alistar conjugation

alistar

No pude creerlo cuando te alistaste en el ejército.
Couldn't believe it when you went in the army.
De cuando te alistaste hace seis meses.
From when you signed up six months ago.
Me pregunto si es por eso que te alistaste.
I wonder if that's why you enlisted.
Así que te alistaste como tu padre.
So you joined up like your dad.
Es cierto, ¿no podías nadar. cuando te alistaste, verdad?
Oh, that's right, you couldn't swim when you enlisted, could you?
Oh, es verdad, no sabías nadar cuando te alistaste, ¿verdad?
Oh, that's right, you couldn't swim when you enlisted, could you?
¿Sabías que tendrías que volar cuando te alistaste?
Did you realize you might have to fight when you joined?
Siempre me he preguntado por qué te alistaste.
I always wondered why you enlisted.
Cuando te alistaste, me llamó.
When you enlisted, he called me.
Estaba celosa cuando te alistaste.
I was jealous when you signed up.
¿Es para eso que te alistaste?
Is that what you signed up for?
Es para lo que te alistaste.
It's what you signed up for.
Sabemos por qué te alistaste.
We both know exactly why you signed up.
Tú te alistaste a mis espaldas.
You signed up behind my back.
¿Por qué te alistaste como voluntario?
Why did you have to volunteer?
¿Entonces por qué te alistaste?
Then why did you join up?
¿Por qué te alistaste, Gabriel?
So why'd you enlist, Gabriel?
¿Por qué no alistaste a Oscar?
Hey, why don't you volunteer Oscar?
¿Fue por eso que te alistaste?
Is that why you signed up?
Es para lo que te alistaste.
Yeah. It's what you signed up for.
Want to Learn Spanish?
Spanish learning for everyone. For free.
SpanishDict Premium
Have you tried it yet? Here's what's included:
Cheat sheets
No ads
Learn offline on iOS
Fun phrasebooks
Learn Spanish faster
Support SpanishDict