The Chinese word **振动** (zhèndòng), meaning "vibration" or "oscillation," is a compound word formed through the combination of two semantically related characters: **振** (zhèn), which conveys the action of shaking, vibrating, or stirring up, and **动** (dòng), which means to move or to set in motion. Together, they create a logical and intensified meaning where "振" specifies the type of motion as a rapid, back-and-forth shaking, and "动" provides the core concept of movement, resulting in the precise technical term for a repetitive mechanical oscillation. This formation follows a common pattern in Chinese where two characters with overlapping or complementary meanings are joined to define a more specific concept.