往復

to go and come back / to make a return trip / backwards and forwards (e.g. of piston or pump action) / to reciprocate (of machine part)

to go (in a direction) / to / towards / (of a train) bound for / past / previous

old variant of 往[wang3]

to go and return / to return / to resume / to return to a normal or original state / to repeat / again / to recover / to restore / to turn over / to reply / to answer / to reply to a letter / to retaliate / to carry out

reciprocating saw

backwards and forwards action (e.g. of piston or pump) / reciprocating motion