To identify the antonym of reconciled, we first define it. "Reconciled" signifies agreement or peace with a situation.
Consider the following definitions:
| resistant | opposing or being against something |
| estranged | alienated or distanced |
| cooperate | working together for a common objective |
| agreed | sharing the same opinion |
The term "resistant" denotes opposition or being against something, which directly contrasts with being reconciled. Therefore, resistant is the correct choice.