briskly and efficiently; in a quick, no-nonsense manner.
彼女はてきぱきと部屋の掃除を終えた。
She finished cleaning the room quickly and efficiently.
てきぱき仕事をこなす人は職場で信頼される。
People who work briskly are trusted at the workplace.
上司がてきぱき指示を出したので、会議は予定より早く終わった。
Because the boss gave clear, brisk instructions, the meeting ended earlier than planned.