baby-boom

The term is a modern compound, formed in the mid-20th century from two distinct English words. 'Baby' is a Middle English word of imitative origin, reflecting the babbling sounds of an infant. 'Boom' entered English in the late 19th century from Dutch, originally imitative of a resonant sound and later metaphorically extended to describe a period of rapid commercial growth or popular excitement. The compound 'baby-boom' logically applies this metaphor of explosive growth directly to the demographic phenomenon of a sharp, sustained rise in birth rates, most famously characterizing the post-World War II period in several Western nations.

Structure: baby (infant) + boom (sudden rapid growth) baby: Origin: Middle English, likely imitative of infant speech. Functional role: The core noun, specifying the subject of the increase. boom: Origin: Likely imitative of a loud, deep sound; Dutch bommen (to hum, buzz). Functional role: A noun suffix indicating a period of sudden economic or demographic expansion.