make up to 补偿
Nothing can make up for what they have suffered.
什么也不能补偿他们所受的痛苦。
I was a jerk, so to make it up to you, I did some sniffing around about the dead man they found in front of your neighbor's house.
我是个混蛋，为了补偿你，我查了一下，在你邻居家门前发现那死者的底细。

feel terrible about 感觉很糟糕
Of course he will feel terrible guilt about all of this.
他当然会对所有这些感到非常内疚。
I'm afraid I still feel terrible.
我恐怕我还是感觉很糟糕。