The word 动力 is formed through the conceptual combination of its two component characters: 动 (dòng), meaning "to move" or "movement", and 力 (lì), meaning "power" or "force". It is not a grammatical phrase but a single compound unit where the first character, 动, describes the domain or action (motion), and the second character, 力, specifies the type of energy or causative agent involved. Together, they fuse these ideas to create the new, integrated concept of "driving force", "motive power", or "dynamism", where the power (力) that causes movement (动) is encapsulated in one term.