Etymology

utmost

ut·most
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Today it means: The most extreme; greatest, ultimate. Full definition →

Middle English utmost ← Old English ūtmest ← Proto-Germanic *ūt
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The story

  1. Proto-Indo-European · derived from*úd“out, outward”
  2. Proto-Germanic · inherited from*ūt“out, outward”
  3. Old English · inherited fromūtmest
  4. Middle English · inherited fromutmost
  5. English todayutmost

PIE word *úd From Middle English utmost, utemest [and other forms], from Old English ūtmest, ūtemest [and other forms], from ūt, ūte (“out; outdoors, outside”) + -mest (suffix meaning ‘furthest’, used to form superlatives of some adjectives) (and conflated with most). Ūt is derived from Proto-Germanic *ūt (“out, outward”), from Proto-Indo-European *úd (“out, outward”). Equivalent to out + -most.

Words from the same roots

Proto-Germanic*ūt all →

out

Proto-Indo-European*úd all →

outasunderoutenur-

Etymology from Wiktionary, CC BY-SA 4.0.