Where does “C₂” come from?

C₂ (Translingual) comes from Translingual C, from Latin celeritas, from Latin -tās, from Proto-Indo-European -teh₂ts, from Proto-Indo-European -teh₂, from Proto-Indo-European -tós — Creates verbal adjectives from verb stems.

Ancestry of “C₂”, step by step

C₂ traces back through two separate lines of ancestry.

via Translingual C

StepLanguageWordMeaning
1TranslingualCRoman numeral hundred; the hundredth
2Latinceleritasquickness, speed, swiftness, haste, celerity
3Latin-tāsty, -dom, -hood, -ness, -ship
4Proto-Indo-European-teh₂tsUsed to form nouns representing state of being
5Proto-Indo-European-teh₂Used to form nouns representing state of being
6Proto-Indo-European-tósCreates verbal adjectives from verb stems

via Translingual 2

StepLanguageWordMeaning
1Translingual2
Every word from Proto-Indo-European -tós