בְּרִית
brit
covenant, binding agreement · noun (f.)

Not a casual promise — a brit is sealed, often with a sign (a rainbow, a rite, a meal), and it binds both sides even when one side falters.
וַהֲקִמֹתִי אֶת־בְּרִיתִי אִתְּךָ.
“"And I will establish my brit with you" (Genesis 6:18).”
What is a brit-like promise in your own life — one that holds even when it is hard to keep?