The first thing I noted was you mentioned that kundalini was rooted in the
word for hair.
Might I offer another scenario.
The Oriental Great Goddess of Wisdom was know by the names of Cunti or Kunda
(Kunda specifically identified as the Yoni of the Universe). The Goddess of
Wisdom has again and again been associated with the serpent or the snake in
cultures worldwide and it seems probable that as Kundalini is about arousing
the coiled serpent of wisdom at the base of the spine that the word
kundalini evolved from Kunda the Goddess.
As you already know, C and K are
frequently interchanged in different languages. And so it is that from
Cunti and Kunda we get the probable origins of the words for country, kin,
and kind (Old Englis CYN, Gothic KUNI)...
ALSO related the Latin CUNNUS, middle English CUNTE, Old Norse and Frisian
Basque KUNA....other cognates are "cunablula" (a cradle), "Cunina" (a Roman
goddess who protected children)..."cunctipotent" (all powerful....having
cunt magic), "cunicle" (a hole or passage....easy to see that kin meaning
relative comes from the image of "one born from the same cunt").....also
cunning (clever), kenning & ken (knowledge, learning, insight,
Kunda made it all the way to Ireland and is believed by many to
be the precursor of the Irish Goddess KILDA whose shrines were everywhere
until the Christians came and destroyed them or turned them into Christian
churches. Unfortunately for the Christians
the area around the shrines also bore the name of the Goddess in the prefix
KIL, and lives on today in such names as KILdare, KILarney, KILkenny, etc.