Correct
往复
/ wǎngfù /
Strokes
Definition
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)
Example
As a Verb
move back and forth; reciprocate; move to and fro
1
Xúnhuánwǎngfù
循环往复
,
yǐzhì
以至
wúqíong
无穷
repeat itself in endless cycles; be forever in a loop
2
Wǎngfù
往复
yùndòng
运动
reciprocating motion; alternating motion; backward and forward movement
As a Verb
contact; exchange visits
3
Shūxìn
书信
wǎngfù
往复
exchange letters