Where does “whodunnitry” come from?

whodunnitry (English) comes from English ry — A test pattern consisting of a repeating character string alternating letters R and Y, used to test five-level teleprinter and radioteletype (RTTY) systems.

whodunnitry (English): The plot or technique characteristic of...

Definitions

  1. The plot or technique characteristic of...

Ancestry of “whodunnitry”, step by step

whodunnitry traces back through two separate lines of ancestry.

via English ry

StepLanguageWordMeaning
1EnglishryA test pattern consisting of a repeating character string alternating letters R and Y, used to test five-level teleprinter and radioteletype (RTTY) systems

via English whodunnit

StepLanguageWordMeaning
1EnglishwhodunnitAlternative spelling of whodunit
Every word from English ry