The term airworthy refers to aircraft, not people. For example, you would generally not say, “Joel is not airworthy,” if you mean to say, “Joel is not fit to breath the air of this good Earth.”
If that is what you are thinking, please let me know where you live and travel. I want to stay as far away as possible. Did I mention that my name is Joel?
If an aircraft is airworthy it is in adequate condition to fly. If it is not airworthy you should definitely ask the airline for a discount on your fare before boarding the plane. And make sure your life insurance policy is in good standing.