595. What characters can be added here so that each character contains a part of the previous character? 暗 -> _ -> _ -> 吸

Answer:

暗  AN, kura(i) - dark

吸  KYUU, su(u) - suck, inhale, smoke

暗 -> 章 -> 古 -> 吸

章  SHOU - chapter, badge, mark

古  KO, yue - deceased, cause