IPA: //ˈtaɪmˌkiːpər//
KK: /taɪmˌkipər/
A person or device that measures and records time, often used in workplaces or sports events.
The timekeeper ensured that the race started and ended on schedule.
Timekeeper → It is formed from "time" (from Old English *tima*, meaning a period or duration) and "keeper" (from Old English *cepan*, meaning to guard or protect). A timekeeper is someone who guards or measures the passage of time.
Think of someone who 'guards' ('keeper') the 'period' ('time') — that's why a timekeeper is someone who measures or keeps track of time.