einsteigen

to get in or on .mw-parser-output .object-usage-tag{font-style:italic}.mw-parser-output .deprecated{color:var(--wikt-palette-grey-lime-8,olivedrab)}[with in (+ accusative) ‘a vehicle’]

to join [with in (+ accusative) ‘a company, a team, etc.’]

to go into [with in (+ accusative) ‘a field of business, etc.’]