Hi, English isn’t my mother tongue so I was asking myself that question since I first encounted a w/… Back then I was like: “What tf does ‘w slash’ stand for?” And when I found out I was like “How, why, and is it any intuitive?” But I never dared to ask that until now
It isn’t a random 4-letter word. It’s a common preposition. It’s like using “&” or “+” instead of “and”.