timer
UK: ˈtaɪmə | US: ˈtaɪmər
n. a device used to measure or signal the end of a set period of time
n. a person or thing that records or monitors time
n. (computing) a function or program that tracks elapsed time
The word "timer" combines "time," derived from Old English tīma (a period or interval), with the agentive suffix "-er," indicating a device or person performing an action. The suffix "-er" originates from Old English -ere, used to form nouns denoting roles or tools. The term emerged in the 19th century to describe mechanical devices for measuring time, reflecting industrialization's need for precision.
She set the kitchen timer for 20 minutes while baking cookies.
The athlete used a digital timer to track his sprint speed.
The program includes a built-in timer to limit screen usage.
As the timer beeped, the students handed in their exams.
He works as a timer at the racetrack, recording lap speeds.