rebatir
refute
re-
again, back
+
debate
debate
Rebatir means to refute and can be thought of as re-0 (again0) + debate1, like debating something again to prove it wrong.
verb
  1. refute
    To refute or counter an argument
    El abogado intentó rebatir los argumentos de la fiscalía. // The lawyer tried to refute the prosecution's arguments.