This is the 1110th most frequent Japanese word.
題し
"題し" means "titled" or "concerning."
The word "題し" is used here to mean 'titled as,' indicating the name given to the book.
この本は『未来への扉』と題して書かれました。
This book was written under the title 'Door to the Future'.
Here, "題し" signifies naming or titling the project to reflect its purpose or theme.
彼らはプロジェクトを『環境保護』と題して実施しました。
They carried out the project titled 'Environmental Protection'.
In this sentence, "題し" is used to give a title to the speech based on its topic or message.