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行き来， 往き来， 行来， ゆきき， いきき
1. coming and going, keeping in touch, visiting each other
2. street traffic, highway
来来往往，保持联系，互相探望；街道交通，高速公路
する， 為る
1. to do, to carry out, to perform
2. to cause to become, to make (into), to turn (into)
3. to serve as, to act as, to work as
4. to wear (clothes, a facial expression, etc.)
5. to judge as being, to view as being, to think of as, to treat as, to use...
做，作，干，执行