Odaiji ni means "Take care of yourself" or "Get well soon." This phrase is used when someone is ill or recovering from an illness. It expresses concern and wishes for their quick recovery. You say this to someone who is feeling unwell. For example, "無理しないで、お大事に。" (Don't overdo it, take care of yourself.).

病気の人や体調が悪い人にかける言葉です。体を大切にしてほしいという気持ちを伝えます。「お大事に。」