倍增 (bèi zēng) is a verb meaning 'to double' or 'to increase twofold' — that is, to become exactly twice as much. The character 倍 (bèi) means 'multiple' or 'times', while 增 (zēng) means 'to increase' or 'to add'. Together, they form a compact, formal compound emphasizing precise quantitative growth by a factor of two. It is commonly used in written Chinese — especially in news reports, economic analyses, scientific contexts, and official statements — to describe measurable increases in numbers, rates, output, or intensity.

Unlike more general verbs like 增加 (zēngjiā, 'to increase'), 倍增 implies a specific, exact doubling, making it useful when precision matters. It often appears with subjects such as sales figures, infection rates, energy consumption, or population growth. While grammatically it functions as a verb, it typically requires an explicit subject and object or context indicating what is doubling; it is rarely used intransitively without clarification.