Where does “dummy run” come from?

dummy run (English) comes from English dummy, from English dumb, from English damn, from Middle English dampnen, from Old French dampner, from Latin damnō, from Latin damnum, from Proto-Italic dapnom — to share, divide.

dummy run (English): A trial or practice before the real attempt

Definitions

  1. A trial or practice before the real attempt

Ancestry of “dummy run”, step by step

dummy run traces back through two separate lines of ancestry.

via English dummy

StepLanguageWordMeaning
1EnglishdummyA silent person; a person who does not talk; An...
2EnglishdumbUnable to speak; lacking power of speech; Silent;...
3EnglishdamnTo condemn to hell; To condemn; to declare...
4Middle Englishdampnento damn
5Old Frenchdampnerto damn
6Latindamnōto discredit, find fault, disapprove, reject
7Latindamnumdamage or injury; loss; a fine
8Proto-Italicdapnom
9Proto-Indo-Europeandh₂pnómexpense, investment
10Proto-Indo-Europeandeh₂p-to sacrifice; to lose
11Proto-Indo-Europeandeh₂-to share, divide

via English run

StepLanguageWordMeaning
1EnglishrunTo move swiftly; To flow; To sail before the...
2English-erA person or thing that does an action indicated...
3Middle English-eragentive suffix; agent noun suffix
4Old French-erAlternative form of -ier, verbal suffix;...
5Latin-ārefirst conjugation
6Proto-Italic-āōForms primarily denominative verbs
7Proto-Indo-European-eh₂yétiCreates iterative/ frequentative/ intensive...
8Proto-Indo-European-yétiCreates intransitive, often deponent,...
9Proto-Indo-Europeanyé-
10Chichewaiyehe, she
Every word from Proto-Indo-European deh₂-Every word from Proto-Indo-European deh₂p-Every word from Proto-Indo-European dh₂pnóm