Etymology

tactless

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Today it means: having no tact; unaware or intentionally inconsiderate of someone else's feelings Full definition →

Proto-Germanic *lausaz ← Proto-Indo-European *lewHs- ← English tact
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The story

  1. Englishtact
  2. Proto-Indo-European*lewh₁-
  3. Proto-Indo-European*lewHs-
  4. Proto-Germanic*leusaną
  5. Proto-Germanic*lausaz
  6. English todaytactless

From tact + -less.

Etymology from Wiktionary, CC BY-SA 4.0.