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

Answer:

波  HA, nami - wave

家  KA, KE, ie, ya - house, family

Add 女: 波+女 女+家 

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

婆  BA - old woman

嫁  KA, totsu(gu), yome - marry, blame, wife, daughter in law