also: すぴーでぃ
na-adjective
A loanword from English 'speedy', used as a na-adjective to describe actions, processes, or services that are done quickly and efficiently.
彼の仕事はいつもスピーディーだ。
His work is always speedy.
スピーディーな対応ありがとうございます。
Thank you for your quick response.