Translation of "Flatly" in Spanish

He flatly rejected that idea.

Él rechazó esa idea rotundamente.

- You should have refused his request flatly.
- You should have flatly refused his request.

Tú debiste haber rechazado su solicitud de plano.

You should have refused his request flatly.

Tú debiste haber rechazado su solicitud de plano.

She flatly refused to let him in.

Ella se negó en redondo a dejarlo pasar adentro.

Bela flatly refuses Mongol requests, giving Subotai his casus belli.

Bela llanamente rehuso las peticiones mongol, dandole a Subotai su casus belli.