幻を追う[maboroshiwoou] to pursue an illusion
幻影[genei] phantom
幻覚[genkaku] hallucination
幻覚剤[genkakuzai] hallucinogen
幻姿[genshi] apparition

幻視[genshi] visual hallucination
幻想[gensou] illusions
幻想劇[gensougeki] non-realistic drama
幻像[genzou] phantom

斎む[imu] to avoid
斎く[itsuku] to worship
斎み垣[imigaki] shrine fence
斎日[imibi] unlucky day (according to astrology)

斎戒[saikai] purification
斎戒もく浴[saikaimokuyoku] purification
斎垣[igaki] fence around a shrine
斎宮[saiguu] the ancient imperial princesses serving at the Ise shrine