• 往復おうふく — round trip
• 往来おうらい — traffic / coming and going
• 往路おうろ — outward journey
• 往診おうしん — doctor’s house call
• 往生おうじょう — death / passing into the afterlife
• 往年おうねん — bygone years / former times

The radical 彳 (ぎょうにんべん) represents movement or steps. Combined with the phonetic element 主 (simplified here), 往 expresses the idea of proceeding toward a certain destination or place. It’s frequently used in formal or compound expressions related to transit or movement.