The idiom "何去何从" is formed by combining two parallel interrogative phrases: "何去" and "何从". Each phrase pairs the interrogative character "何" (meaning "where" or "what") with a verb, first "去" (to go) and then "从" (to follow). This repetition creates a compound structure that literally questions "where to go and where to follow", directly conveying a sense of dilemma or uncertainty regarding a decision or path.