singularly

I was singularly at ease.

[|singularly](v) : in a [|singular] manner

[|singular](adj) : being only one of a larger population; being the only one of the kind; __unique__

I think the sentence means that he was uniquely at ease. I don't think that this guy was at ease at all. I think he just said that so he wouldn't look bad, not that you can't look bad after killing an old man. 1197298935