[bookofjoe]

that this word goes both ways in time is the best thing I've learned so far today

From Oxford Languages:

>a·nach·ro·nism

noun

a thing belonging or appropriate to a period other than that in which it exists, especially a thing that is conspicuously old-fashioned.

"everything was as it would have appeared in centuries past apart from one anachronism, a bright yellow construction crane"

an act of attributing a custom, event, or object to a period to which it does not belong.

"it is anachronism to suppose that the official morality of the age was mere window dressing"