The word "瘫痪" is formed by combining two characters, each containing the illness radical 疒, which denotes a medical condition. The first character, 瘫, incorporates the component 难 primarily for phonetic indication to suggest the sound "tān", while the second character, 痪, uses 奂 for its phonetic hint to approximate "huàn". Together, these characters create a compound where the shared radical reinforces the meaning of physical impairment, and the phonetic components guide pronunciation, resulting in a term meaning paralysis.