～狂
～きょう · ～kyou · JLPT N1 · noun
lunatic
狂 — dog radical 犭+ king 王
Originally written with 犬 (dog) as the semantic component and 㞷 as the phonetic, depicting a wildly running dog. The meaning extended from 'mad dog' to 'crazy, wild, unrestrained' in general. The modern form simplifies the right side to 王.