2632. What character can be added to both of these characters to give other characters? 波_ -> _因

波  HA, nami - wave

因  IN, yo(ru) - depend on, be limited to

Add 女:波+女 女+因  

女  JO, NYO, NYOU, onna, me - female, woman

婆  BA - old woman

姻  IN - marriage