injury
痍 centers on physical damage to the body: an injury or wound.
痍 combines 疒 (sickness) with 夷, which likely contributes the sound and may relate to the idea of damage or injury.
The sickness enclosure 疒 wraps around 夷, a shape that looks like a person with a bow. Picture a wounded person inside a medical ward: the injury is being treated.
For イ, imagine an injured person saying 'ee!' in pain: 'ee' -> イ, and the wound inside 痍 makes them cry out.