1490. What character can be added to both of these characters to give other characters? 西_ -> _子

Answer:

西  SAE, SEI, nishi - west

子  SHI, SU, ko - child

Add 女:西+女 女+子 

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

要  YOU, i(ru) - essential(s) need

好  KOU, kono(mu), su(ku) - like