Where does “5K” come from?

5K (English) comes from English K, from English kilo-, from French kilo-, from Ancient Greek χίλιοι, from Proto-Hellenic *kʰehliyoi, from Proto-Indo-European ǵʰéslom, from Proto-Indo-European sm̥-, from Proto-Indo-European sem- — together, one.

5K (English): A road race over 5 000 metres

Definitions

  1. A road race over 5 000 metres

Ancestry of “5K”, step by step

5K traces back through two separate lines of ancestry.

via English K

StepLanguageWordMeaning
1EnglishKThe ordinal number eleventh, derived from this...
2Englishkilo-API; In the International System of Units and...
3Frenchkilo-kilo
4Ancient Greekχίλιοιthousand
5Proto-Hellenic*kʰehliyoithousand
6Proto-Indo-Europeanǵʰéslomthousand
7Proto-Indo-Europeansm̥-one; with, together
8Proto-Indo-Europeansem-together, one

via English 5

StepLanguageWordMeaning
1English5
Every word from Proto-Indo-European sem-