"ditch river": river as dirty as a ditch; dirty river

drainage ditch

drainage ditch cover

Alternative spelling of どぶ (dobu, “drainage ditch”)

aboriginal (original; indigenous)

Alternative form of むかしから (mukashi kara)

the past, old times / ancient

return / go back / come back / turn back

sailing ship, sailboat, sail

question, problem on homework etc. / a question; a matter (of time etc.) / a problem (something that needs to be dealt with); a trouble / an issue; a matter