Likely to show a particular characteristic, usually a negative one, or to be affected by… Lying with the front or face downward. Having a natural inclination or tendency to something
See examples of prone used in a sentence. To often do something or suffer from something, especially something bad Definition of prone adjective in oxford advanced learner's dictionary
Supine is lying on your back. There are 12 meanings listed in oed's entry for the adjective prone, five of which are labelled obsolete See ‘meaning & use’ for definitions, usage, and quotation evidence. If you're prone to doing something, it means you're likely to do it, have a habit of doing it, or are susceptible to it
People who are prone to getting the flu every winter should probably get a flu shot in the fall. To be prone to something, usually something bad, means to have a tendency to be affected by it or to do it.