At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga.
Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus.
Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
In this context, nobody answers your question.
A synonym of reluctance is hesitance. Therefore if you have a reluctance to participate. It means that you hesitate to participate. Often reluctance is cause by simply not wanting to do something, but it can also be caused by other factor, such as a sense of danger, or a fear of some kind. 'I was reluctant to participate in the discussion because I thought I would cry.'
Reluctance is a not wanting to do something because one fears something bad will happen. And participate mean to join into something, like one would participate in a soccer game by being a forward or something like that.