Godan verb with 'ru' ending, Intransitive verb
to go upstream; to go up (a river)
Usually written using kana alone
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. to go back (to the past or origin); to date back (to); to trace back (to); to be retroactive (to)
Usually written using kana alone
Also written 溯る【さかのぼる】、逆上る【さかのぼる】、泝る【さかのぼる】