to swear, to vow
He made me swear not to say anything.
Tuvimos que jurar ante un tribunal que no te habíamos matado.
We had to swear before a court that we hadn't killed you.
— Die Blechtrommel (1979)
Tuve que jurar, que vendría por la mañana.
I had to swear that I would come in the morning.
— El agente secreto (2025)