さかのぼ
sakanoboru

Godan Verb (ru)

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

Intransitive
Usually Written in Kana
さけ がわをさかのぼって すな産卵 さんらんする。
sakewa kawao sakanobotte sunani sanran suru.
Salmon go up the river and lay their eggs in the sand.
Godan Verb (ru)

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

Intransitive
Usually Written in Kana
その教会 きょうかい いち いち なな さん ねんまでさかのぼる。
sono kyōkaiwa senhyaku nanajū sannemmade sakano. boru
The church dates back to 1173.
Other forms: