1912. What character can be added to both of these characters to give other characters? 止_ -> _台

Answer:

止  SHI, to(meru), to(maru) - stop

台  DAI, TAI - stand, pedestal, platform

Add 月:止+月 月+台

月  GETSU, GATSU, tsuki - moon, month

肯  KOU - agree, consent

胎  TAI - womb, uterus