terminasteis
-you ended
The word terminasteis is the preterite form of terminar in the second person plural.
See the full terminar conjugation

terminar

Sí, y no terminasteis mi casa.
Yeah, and then you guys never finished my house.
¿Y por qué terminasteis vosotros dos?
And why did it end between you two?
Si recuerdo bien, terminasteis de común acuerdo.
If I remember correctly, the breakup was mutual.
¿Cuánto hace que terminasteis?
How long ago did you two break up?
¿Entonces qué terminasteis haciendo?
So, what did you end up doing?
Ya terminasteis.
You're finished already.
Probablemente hubo un poco de vino para animar la cosa y luego terminasteis con un poco de acción en la cama.
There was probably a little wine involved to set the mood and then you finished it off with a little hanky panky.
Pero la nube y la niebla que le impedían ver se disiparon, el sol resplandeció, la luz vino a vosotros y terminasteis con la guerra fratricida.
But the storm cloud and the fog, through which You could see nothing, lifted; the sun began to shine; You understood and were finished with fratricidal war.
¿Terminasteis por esta noche?
All through for the night?
Pero chicos, vosotros lo terminásteis, ¿verdad?
You guys just finished it, right?
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