"Resolver" means to terminate an agreement for breach of one of the parties. However, the general concept of "termination" shares the same purpose as "resolução", which is the act of ending a contract. Therefore, in most contexts, using "terminate" as a translation for "resolver" should be sufficient.
There are multiple definitions - click on the translation that matches your context.
(formal) to end something so that it no longer exists (eg a contract, someone's employment etc)
Huelin Renouf's chief executive said the decision to terminate the contract had been 'disappointing'.