mirror writing

(computing) character encoding

any of various writing systems claimed to predate Japan's adoption of Chinese characters and perpetuated by feudal scholars, but widely discredited by modern scholars

(possibly dialect, Tōhoku) any of various writing systems claimed to predate Japan's adoption of Chinese characters and perpetuated by feudal scholars, but widely discredited by modern scholars

rune

one thing

the past / ancient times

(not of a person) old, aged, antiquated

old

(archaic) antique, old-fashioned / (colloquial) ancient