Etymology

self-interest

Today it means: One's personal interest or advantage, especially when pursued without regard for others. Full definition →

English interest ← Middle English self- ← Old English self-
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The story

  1. Proto-Indo-European*swé?
  2. Proto-Indo-European*selbʰ-
  3. Proto-Germanic*selbaz
  4. Old Englishself
  5. Old Englishself-
  6. Middle Englishself-
  7. Englishself-
  8. Englishinterest
  9. English todayself-interest

From self- + interest.

Etymology from Wiktionary, CC BY-SA 4.0.