passernices = whetstone ?

From: Cuadrado
Message: 60062
Date: 2008-09-16

Hello : Pline :
165 repertae sunt et in Italia aqua trahentes aciem acerrimae
effectu, nec non et trans Alpis, quas passernices vocant. quarta
ratio est saliva hominis proficientium in tonstrinarum officinis.
Laminitanae ex Hispania citeriore in eo genere praecipuae.

Passernices = oilstone/whetstone = celtic name ?

may be from Kw-asto- = cough
whetstone > to scrape > cough ?

or Pokorny

Pasto- = solide

http://www.indo-european.nl/cgi-bin/startq.cgi?
flags=endnnnl&root=leiden&basename=%5Cdata%5Cie%5Cpokorny

Root / lemma: pasto-

English meaning: solid

German meaning: `fest'

Material: Ai. pastya´-m `Wohnsitz'; arm. hast (i-St. ) `fest'; aisl.
fastr, ags. f?st, as. fast, ahd. festi, nhd. fest.

References: WP. II 7 f.

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