archaize

To give an archaic quality or character to; make archaic, to suggest the past.

The statue had an archaized quality to it.

An Egyptologist's mind immediately turns to the ancient Egyptian counterpart to such an imagined protosactuary: a reed hut that all late Egyptian temples, in their archaizing longing to return to the origins, sought to emulate in stone through the typically Egyptian temple features of inward-sloping walls, torus and corvetto cornice.

To speak, write, etc. in an archaic manner.