1264. What character can be added to both of these characters to give other characters? 矛_ -> _反

Answer:

矛  MU, hoko - halberd, spear

反  HAN, HON, tane, so(ru) - anti-, bend back

Add 木:矛+木 木+反 

木  MOKU, BOKU, ki - tree

柔  JUU, NYUU, yawa(rakai) - soft

板  HAN, BAN, ita - board