Japanese phrase
それは絶対にお断りします。 so re wa zet tai ni o kotowa ri shi ma su
Meaning
I flatly refuse.
When to use it
A firm refusal of a request or proposal. It sounds formal, forceful, and final, so it is mainly used when a softer refusal would not be clear enough.
Example dialogue
この条件で契約してくれますか？ ko no jō ken de kei yaku shi te ku re ma su ka
Can you sign a contract on these terms?
それは絶対にお断りします。 so re wa zet tai ni o kotowa ri shi ma su
I flatly refuse.