archaic
ar-KAY-ikadjMeaning very old, or no longer in everyday use
Memory hook ARCH-aic: as old as a crumbling ARCH. Among the broken columns, Professor Edwin reads aloud from a crumbling scroll: “Hark! Thou art welcome!” Words that old, no longer used, are archaic.
“Thou” and “thee” are archaic words for “you.”
In context The town still settled its disputes with a set of archaic rules written in 1790, long after every other town had updated theirs.
Similar old-fashioned, outdated, obsolete, ancient
Opposite modern, current, up-to-date
From Greek archaikos, “old-fashioned,” from archaios (ancient), from arche (beginning).