The word 教室 (jiàoshì, classroom) is formed by combining two individual characters, each contributing its core meaning to create a new, composite concept. The first character, 教 (jiào), carries the fundamental idea of "teaching" or "instruction". The second character, 室 (shì), provides the essential meaning of a "room" or "enclosed space". Therefore, the word is constructed through direct semantic combination, literally meaning "teaching room", to logically denote the specific place where instruction occurs.