The word 随便 is formed through a conceptual fusion where the first character 随 (suí), meaning "to follow" or "along with", merges with the second character 便 (biàn), meaning "convenient" or "easy". Together, they create a unified idea that moves beyond simple addition, evolving into a mindset of "following whatever is convenient", which embodies a relaxed attitude of yielding to circumstances, having no rigid preferences, and allowing things to proceed in the most straightforward, unforced manner.