シキ 
() style () rite () function
                            
しき (n,n-suf) (1) equation, formula, expression, (2) ceremony, (3) style, (4) (arch) enforcement regulations (of the ritsuryo)
しきじ (n) ceremonial address
しきじょう (n) ceremonial hall, place of ceremony (e.g. marriage)
しきてん (n) ceremony, rites
しきぶ (n) (Meiji era) official responsible for court ceremonies

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Etymologies: 中文字譜 : 説文解字