式, しき
Noun, used as a suffix
1. way, style, fashion, method, system, form, type
2. ceremony, rite, ritual, celebration
3. wedding (ceremony)
4. equation, formula, expression
See 律令, historical term
5. enforcement regulations (of the ritsuryō legal codes)
彼は事故でその式に出席できなかった。
が
Particle
1. indicates the subject of a sentence
literary in modern Japanese; usu. written as ヶ in place names
2. indicates possession
Conjunction
3. but, however, (and) yet, though, although, while
4. and
5. used after an introductory remark or explanation