stimulus
UK: ˈstɪmjʊləs | US: ˈstɪmjələs
n. something that incites action or energy
n. (biology) an agent that triggers a physiological response
n. (economics) a factor that spurs growth or activity
Derived from Latin stimulus (a goad, prick, or spur), originally referring to a physical prod used to urge livestock forward. The root stimul- implies sharp pressure or provocation, reflecting the word’s core idea of incitement. Over time, it broadened to abstract triggers (e.g., psychological or economic stimuli), retaining the original logic of "prodding into action."
The new tax policy served as a stimulus for small businesses.
Light acts as a stimulus for plant growth.
The coach used praise as a positive stimulus.
Economic stimulus packages aim to revive markets.
The sudden noise was an unexpected stimulus.