This is the 1922nd most frequent Japanese word.
跡
"跡" means "trace," "mark," "track," or "remains" in English.
跡 is used to refer to physical traces or marks left by someone or something, here specifically footprints (足跡).
足跡は雪の上に残っている。
The footprints are left on the snow.
跡 is used metaphorically to denote a trace or remains of something from the past, in this case, historical marks or remnants.
歴史の跡を辿る。
I trace the marks of history.
跡 is used to refer to an archaeological site or remains of structures from ancient times, indicating the place or mark left by former civilizations.