正式せいしき
seishiki

Noun
na-Adjective
no-Adjective

1. formal; official; regular; proper; legal; due (formalities)

彼女かのじょ服装ふくそう正式せいしきなパーティーでは場違ばちがいだった。
kanojono fukusōwa sēshikina pātiidewa bachigaidatta.
Her clothes were out of place at a formal party.