1083. What character can be added to both of these characters to give other characters? 折_ -> _正

Answer:

折  SETSU, o(ru), o(reru), ori - break, fold, yield, bend, occasion

正  SEI, SHOU, tada(shii), masa(ni) - correct, just, exact

Add 言: 折+言 言+正 

言  GEN, GON, i(u), koto - say, speech

誓  SEI, chika(u) - swear, pledge, vow

証  SHOU - proof