Etymology

uptime

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Today it means: The period of time a computer has functioned since last requiring a reboot. Full definition →

English time ← Middle English tyme ← Old English tīma
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The story

  1. Proto-Indo-European*upó
  2. Proto-Germanic*ub
  3. Proto-Germanic*upp
  4. Proto-West Germanic*upp
  5. Old Englishupp
  6. Middle Englishup
  7. Englishup
  8. Proto-Indo-European*deh₂-
  9. Proto-Indo-European*deh₂y-
  10. Proto-Indo-European*dih₂-mon-
  11. Proto-Germanic*tīmô
  12. Proto-West Germanic*tīmō
  13. Old Englishtīma
  14. Middle Englishtyme
  15. Englishtime
  16. English todayuptime

From up (“(computing) functional, working”, adjective) + time.

Etymology from Wiktionary, CC BY-SA 4.0.