The word 渡过 is formed by combining the character 渡, which specifically means "to cross a body of water" (like a river or sea), with the character 过, which carries the more general sense of "to pass" or "to go through". This combination creates a single conceptual unit that extends the concrete, physical action of crossing a waterway into a metaphorical space. It effectively visualizes navigating through a challenging period or situation as if it were a treacherous stretch of water, thereby blending the literal image of a journey across with the abstract experience of enduring and emerging from difficulty.