The word "入场" is formed through a standard Chinese morphological process known as **compounding**, where two independent, meaningful characters (morphemes) are combined to create a new word with a specific meaning. Here, "入" (rù) means "to enter," and "场" (chǎng) means "a venue, site, or field." When joined, they create a **verb-object compound** where the action "入" (enter) acts upon the object "场" (venue), thus meaning "to enter a venue" or "admission." This formation is semantically transparent, as the meaning of the whole is directly derived from the sum of its parts, and it commonly refers to the act of entering places like theaters, stadiums, or markets.