Where does “vācaṅga” come from?

vācaṅga (Pali) comes from Pali aṅga, from Sanskrit अङ्ग, from Proto-Indo-European h₂eng- — curve, bend.

Ancestry of “vācaṅga”, step by step

vācaṅga traces back through two separate lines of ancestry.

via Pali aṅga

StepLanguageWordMeaning
1Paliaṅgamember, body part
2Sanskritअङ्गa limb of the body; a limb, member; the body
3Proto-Indo-Europeanh₂eng-curve, bend

via Pali vaca

StepLanguageWordMeaning
1Palivacaword, saying
Every word from Proto-Indo-European h₂eng- →Every word from Sanskrit अङ्ग →Every word from Pali aṅga →