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properly; accurately; exactly; precisely; regularly
neatly; tidily; orderly
きちんと片付けてから出かけた。
I tidied up properly before going out.
引っ越しを終えた部屋は、本棚にも机の上にもすべての物がきちんと並べられていた。
In the room after the move, every item — on the bookshelf and on the desk alike — had been arranged neatly in place.
彼はきちんと約束を守る人だ。
He's someone who properly keeps promises.