Where does “backstop” come from?

Backstop comes from English back and English top, ultimately from Old English stoppian, Old Swedish nattbakka, Latin bassus, Ancient Greek βάσις, and Proto-Indo-European gʷémtis, tracing a semantic path from a foundation or base to a stopping point.

backstop (English): A thing or a person put in the rear or in the...

Definitions

  1. A thing or a person put in the rear or in the...

Ancestry of “backstop”, step by step

backstop traces back through two separate lines of ancestry.

via English back

StepLanguageWordMeaning
1EnglishbackNear the rear; Not current; Far from the main...
2Frenchbacferry; vat; high school exit exam in France; A...
3Frenchbaccalauréatbaccalaureat; bachelor's degree
4Medieval Latinbaccalaureatusbachelor's degree
5Latinbaccalaureusbachelor
6Latinlaurealaurel, bay tree; crown, wreath or branch of...
7Latinlauruslaurel tree; laurels; a crown of laurel
8English-aceousOf, relating to, resembling or containing the...
9Latin-āceusaceous; resembling, having the nature of, forming, belonging to
10Latin-āxish, -y
11Latin-iumSuffix used to form abstract nouns, sometimes...
12Latin-iusforming adjectives from nouns; nominative neuter...
13Proto-Italic-jōsForms comparative adjectives
14Proto-Indo-European-yósCreates adjectives from noun or verb stems

via English stop

StepLanguageWordMeaning
1EnglishstopTo cease moving; To not continue; To cause to...
2EnglishtopThe highest or uppermost part of something; A...
3Middle EnglishtopThe summit or top of something, especially a...
4Old Englishtopptop, summit (of something)
5Proto-West Germanic*topptop, summit, crest
6Proto-Germanictuppaztuft, plait; top, summit
7Proto-Indo-Europeandumb-tail, rod, staff, pole, penis; tail, rod, staff,...
Every word from Proto-Indo-European -yós