さかのぼる

verb (godan)遡るさかのぼる · sakanoboru

1. Englishto go upstream; to go up (a river)

   • 鮭は川をさかのぼって砂に産卵する。Salmon go up the river and lay their eggs in the sand.

2. Englishto go back (to the past or origin); to date back (to); to trace back (to); to be retroactive (to)

   • その教会は１１７３年までさかのぼる。The church dates back to 1173.

Source: JMdict (EDRDG) · CC BY-SA 4.0 (EDRDG)