Etymology

parameterless

P3A1R1A1M3E1T1E1R1L1E1S1S1

Today it means: Taking no parameters; having zero arity. Full definition →

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

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

From parameter + -less.

Etymology from Wiktionary, CC BY-SA 4.0.