さかのぼる
N2遡る
溯る逆上る泝る
[sakanoboru]
Meanings
1.GodanIntransitive
to go upstream; to go up (a river)
2.GodanIntransitive
to go back (to the past or origin); to date back (to); to trace back (to); to be retroactive (to)
Examples
鮭は産卵のために川を遡った。
The salmon swam upstream to spawn.
この法律の起源は明治時代まで遡る。
The origin of this law traces back to the Meiji era.
歴史を遡ると意外な事実が見つかる。
Looking back through history, you find surprising facts.