contract, undertake - enter into a contractual arrangement

stipulate - give a guarantee or promise of; "They stipulated to release all the prisoners"

provide - determine (what is to happen in certain contingencies), especially by including a proviso condition or stipulation; "The will provides that each child should receive half of the money"; "The Constitution provides for the right to free speech"

guarantee, vouch - give surety or assume responsibility; "I vouch for the quality of my products"

specify, stipulate, condition, qualify - specify as a condition or requirement in a contract or agreement; make an express demand or provision in an agreement; "The will stipulates that she can live in the house for the rest of her life"; "The contract stipulates the dates of the payments"

jus civile, Justinian code, Roman law, civil law - the legal code of ancient Rome; codified under Justinian; the basis for many modern systems of civil law

contract, undertake - enter into a contractual arrangement