The word averiguó is the preterite form of averiguar in the third person singular.
See the full averiguar conjugation

averiguar

Deberías haber visto su cara cuando lo averiguó.
You should have seen his face when he found out.
Opie averiguó la verdad antes de que pudiera hacerlo.
Opie found out the truth before I could do that.
Russell averiguó que Sean y Julia compraron el pub a Connor.
Russell found out that Sean and Julia bought the pub from Connor.
Pero... cuando ella lo averiguó, fue capaz de perdonarte.
But... when she found out, she was able to forgive you.
Cree que finalmente averiguó lo que salió mal en Navidad.
He thinks he finally figured out what went wrong at Christmas.
Palmer averiguó que estábamos haciendo esto con Seidel.
Palmer figured out that we're doing this with Seidel.
Él averiguó lo que estaba haciendo y vio las consecuencias.
He found out what we were doing, and you saw the consequence.
Hasta que averiguó que solo era una de tantas.
Until you found out you were just one of many.
Él averiguó que yo estaba en La Liga de la Justicia.
He figured out I was in on The Justice League.
¿Qué averiguó Aubrey sobre los participantes en el juego?
What did Aubrey find out about the players in the game?
¿Por qué no averiguó la policía quién compró los pasajes?
Why not find out who bought the plane tickets?
Sí, creo que averiguó qué le faltaba a Eric.
Yeah, I think he figured out what Eric was missing.
Ella averiguó lo que hiciste tú e hizo lo mismo.
She figured out what you did and did the same thing.
Cuando lo averiguó, se dio cuenta que no podía confiar en mi.
When she found out, she realized she couldn't trust me.
¿Qué averiguó su investigación acerca de este club?
What did your investigation find out about this club?
Así que por qué no me dice exactamente lo que averiguó.
So why don't you tell me exactly what you found out.
Mi padre averiguó que tanteó a varias compañías.
My father found out he put feelers out to several companies.
Solo tenemos que averiguar qué cosas averiguó sobre ella.
We just need to find out what he had on her.
Supongo que no averiguó nada sobre mis cosas...
I suppose you didn't find out anything... about my things.
Oigan, creo que el otro equipo ya lo averiguó.
Hey, guys, I think the other team figured it out.
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