兮 (w)

(xī) (particle in old Chinese similar to 啊)

兮兮 (w)

(xīxī) (particle used to exaggerate certain adjectives, in particular 神經兮兮|神经兮兮, 髒兮兮|脏兮兮, 可憐兮兮|可怜兮兮, and 慘兮兮|惨兮兮)