Inigo wants to say that obviously trying isn't enough here. That it seems like there's something stopping Taiki that's so strong and so big that the kirin just can't overcome it by himself. So strong and so big that it's hurting the other just by trying.

"I.. I don't think it's going to work," he says, shaking his head.

It's not the kind of sentiment he'd like to convey here, but if he would say anything else here, he'd just be outright lying about his assessment of their current situation.

"I don't think I have enough of Gyousou in me that you could bow for me." There, that's a little better. Taking some of the blame off Taiki's shoulders - since he just knows the other is going to blame himself - and taking it upon his own.