Does Latin "pingo" to paint relate to "pix" tar by analogy with "pango" to agree and "pax" peace?

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    Question by yet another sock puppet of suspended user. – Cerberus Jun 13 '19 at 21:53

Disclaimer: I'm not even close to expert in Proto-Indo-European, so maybe I'm missing something important.

Apparently not.

According to this database:

  • pingo comes from PIE root *peik'-
  • pix comes from PIE root *pik-

The source, according to the site is:

Walde-Pokorny's dictionary [possibly the Indogermanisches etymologisches Wörterbuch], compiled by S. L. Nikolayev

... which is a pity, because it was fun to think that the verb to paint and pitch/tar were etymologically related in Latin. (and makes some sense).

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    Right. A connection is ruled by the Balto-Slavic forms, which show a sibilant in the "paint" word and velar in the "pitch" word; this means the former had a palatovelar in PIE, the latter a plain velar. – TKR Jun 13 '19 at 20:56