Statement
Declaration, Allegation
noun, する verb
Exhibit what you want to mention in a loud, clear statement. You have to say it if you want people to listen.
ちんじゅつ
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
まず、被告人が冒頭陳述を行います。
First, the defendant will perform their opening statement.