Subjunctive phrases of indifference (sea como sea)

Unwavering Determination

To express absolute determination and show that you will achieve a goal "no matter what," Spanish uses a repeating subjunctive formula. The pattern is usually [Verb in subjunctive] + lo que / como + [Same verb in subjunctive].

A great example of this is sea como sea (whatever happens / be that as it may). This phrase is perfect for declaring a firm purpose.

Whatever happens, our purpose is firm.
Sea como sea, nuestro propósito es firme.

Whatever It Costs

Another highly common phrase in this pattern is cueste lo que cueste (whatever it costs / at all costs). Use this to emphasize that you will overcome la adversidad (adversity) or make a major sacrificio (sacrifice) regardless of the difficulty.

We are going to overcome the adversity, whatever it costs.
Vamos a superar la adversidad, cueste lo que cueste.
We are going to make the sacrifice, whatever it costs.
Vamos a hacer el sacrificio, cueste lo que cueste.

Whatever They Say

When the obstacle is other people's opinions, use the verb decir (to say). Unlike sea and cueste, which generally stay in the third-person singular in these set phrases, the form of decir must match whoever is speaking.

Use diga lo que diga for a singular person (whatever he/she says), and digan lo que digan for multiple people (whatever they say).

Whatever your mother says, your determination is unstoppable.
Diga lo que diga tu madre, tu determinación es imparable.
Whatever they say, I am not going to sacrifice my free time.
Digan lo que digan, no voy a sacrificar mi tiempo libre.

These phrases are particularly useful when you need to oponerse a (oppose) someone's plans and stand your ground.

I oppose this plan, whatever the boss says.
Me opongo a este plan, diga lo que diga el jefe.

Contributors