covenant

noun

1. An agreement to do or not do a particular thing.
2. A promise, incidental to a deed or contract, either express or implied.
3. A pact or binding agreement between two or more parties (often one that is religious or religiously-based).
4. An incidental clause in an agreement.

verb

1. To enter into, or promise something by, a covenant.

   “Jupiter Covenanted with him, that it should be Hot or Cold, Wet or Dry, […] as the Tenant should Direct.”

   “and they covenanted with him for thirty pieces of silver”

2. To enter a formal agreement.
3. To bind oneself in contract.
4. To make a stipulation.