This is the 8580th most frequent Spanish word.
sep
"Sep" is an informal abbreviation of "sé" (I know) in Spanish.
The word 'sepamos' is the subjunctive conjugation of 'saber' used here to express hope.
Espero que sepamos la respuesta correcta.
I hope we know the correct answer.
The word 'sepas' is the subjunctive conjugation of 'saber' used to make a recommendation.
Es importante que sepas cómo hacerlo.
It is important that you know how to do it.
The word 'sepa' is the subjunctive conjugation of 'saber', expressing doubt in this context.