Distinguishing between "opposites" of "ortho-"

The Greek prefix "ortho-" means "right" (in the sense of "correct", ultimately deriving from "straight"), so strictly speaking the antonym should have a Greek prefix meaning "wrong", but neither "dyschronous" nor "cacochronus" quite works.

So perhaps instead of the antonym of "wrong", we could use the antonym of "straight", i.e. "bent" or "crooked", for which the closest Greek prefix is "scoli-", rendering "scolichronous".¹

But I don't particularly like that, either: something moving against the flow of time isn't following a crooked path, nor even a wrong path, it's simply backwards, as in swimming upriver (which is neither wrong nor crooked).

So perhaps we'd like a prefix which means "against" or "backwards". The Greek prefix "ana-" means "against", so one option is "anachronous" (and the related English word "anachronism" does indeed mean "chronologically misplaced", especially something from the past that doesn't belong here in the present; it is against time).

Another option, which I prefer, is "retrochronous"; the drawback is "retro" is a Latin root, but that's outweighed, in my opinion, by the benefits: "retro-" is both more consonant with "ortho-" (ending with o) and more immediately accessible (few know what "ana-" means, but everyone knows what "retro-" means).

¹ I also considered "scalen-" (meaning "uneven", as in "scalene triangle"), for "scalenochronous", but that's a mouthful and no real improvement over "scolichronous", and "presbychronous" for "old time", but that lacks a sense of motion.

anti-chronus sounds better to me, b.c anti- has the sense of against