Which term would you use to describe someone subject to experiencing unfortunate events?

The term "prone" is appropriate for describing someone who is subject to experiencing unfortunate events. When someone is described as "prone," it indicates a tendency or susceptibility towards a particular condition or outcome. In this context, it refers to the likelihood of encountering negative situations or misfortunes.

The other terms do not align with this meaning. "Lucky" refers to someone who has favorable outcomes or good fortune, which is the opposite of encountering misfortunes. "Fortunate" also conveys positive experiences and outcomes, emphasizing success or well-being. "Resilient" describes someone who can recover quickly from difficulties, implying that they may face unfortunate events but are capable of handling and overcoming them rather than being consistently subject to misfortune. Hence, "prone" is the most fitting term for someone likely to experience unfortunate events.