The word "一时" is formed through the direct combination of the character "一", meaning "one", and "时", meaning "time" or "period", to create a conceptual unit that inherently denotes a single, often brief or specific, segment of time. This formation follows a common Chinese principle where numeric and temporal characters merge to express abstract notions of duration, capturing the idea of a momentary or finite interval without relying on grammatical constructs. The fusion embodies a holistic meaning where the sum of parts suggests transience or a particular point in time, reflecting how classical Chinese often compounds concrete characters to convey nuanced temporal concepts.