2696. What character can be added to both of these characters to give other characters? 日_ -> _垂

日  NICHI, JITSU, hi, ka - sun, day

垂  SUI, ta(reru), ta(rasu) - hang down, dangle, drip

Add 目:日+目 目+垂  

目  MOKU, me - eye

冒  BOU , oka(su) - risk, brave, deft, dare, desecrate

睡  SUI - sleep