The word considerasteis is the preterite form of considerar in the second person plural.
See the full considerar conjugation
Nunca considerasteis la otra opción.
You never considered the other option.
¿Considerastéis que esta mujer tiene dos pequeñas niñas?
Did you weigh that this woman has two little girls?
¿Lo considerasteis desde el principio?
Was he involved right from the start?
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