シュク シュウ 
いわ.う 
() bless () congratulate () celebrate
  
いわい (n) congratulation, congratulations, celebration, festival, congratulatory gift
いわう (v5u,vt) to congratulate, to celebrate
しゅくが (n,vs,adj-no) celebration, congratulations
しゅうぎ (n) congratulations, celebration, congratulatory gift, tip
しゅくじ (n) congratulatory address
しゅくでん (n) congratulatory telegram
しゅくじつ (n,adj-no) national holiday
しゅくはい (n) toast, congratulatory cup
しゅくふく (n,vs,adj-no) blessing

Links: KanjiDic: EDict : Wikimedia
Etymologies: 中文字譜 : 説文解字