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trace; tracks; mark; sign
site; remains; ruins
scar
「痕」 has another reading with different meanings.
テーブルにコップの痕がついていた。
There was a ring mark from a glass on the table.
傷の痕がだんだん消えてきた。
The scar has been gradually fading.
事故の痕が道路にまだ残っている。
Traces of the accident are still on the road.