Which word best describes an individual who continues in their opinion despite challenges?

The word "persistent" accurately captures the essence of an individual who maintains their opinion despite challenges. Persistence signifies a steadfastness and determination in holding onto beliefs, regardless of obstacles or opposition. This quality reflects a strong sense of conviction and resilience, indicating that the person is not easily swayed by external pressures or contrary arguments.

In contrast, indecisive describes someone who struggles to make choices or take a firm stance, which contradicts the idea of holding onto one's opinion. Apathetic refers to a lack of interest or concern, indicating that the individual is disengaged rather than actively maintaining a belief. Reckless suggests a disregard for consequences, which does not align with the concept of being steadfast in one's opinion, as it implies a more careless or hasty approach. Thus, "persistent" stands out as the best descriptor for someone who remains firm in their views despite facing difficulties.