The word "褥疮" is formed by combining the character "褥", which means mattress or bedding and is composed of the radical "衤" indicating fabric and the phonetic component "辱", with the character "疮", meaning sore or ulcer and composed of the radical "疒" indicating sickness and the phonetic component "仓". Together, they create a compound word that literally translates to "bedding sore", specifically referring to bedsores caused by prolonged pressure on the skin from lying in bed.