I think it's rather the other way round 'pupa' being an euphemism
yeah, I thought it has something to do with German - 'Popo' is more or less German equivalent of Polish 'pupa' and if there was some borrowing involved I would bet it was rather German to Polish than the other way round (I pretty much believe 'pupa' to come from 'Popo'_
oh well - it goes further than that - en.wiktionary.org/wiki/puppis
too bad. I found it very interesting ;-(
you can still read the posts - they are not deep in the random thread yet (just been there to check if they're there)
there was not much interesting there to be honest - I'm just an amateur linguist with no real knowledge of languages like Lithuanian, a couple of words or roots of Latin origin and that's mostly it - the only original thing I came up with was the "'pyge' connection'" ;) - you just won't learn that Greek word unless you study a certain field and surprisingly it's not medicine too :)
the *dup- Slavic root is thought to be connected with Lithuanina *dub- root (meaning deep like in river or lake names (Dubissa) or a sink in the ground, a ditch), these are probably cognates with Germanic *diup root word which also meant deep, maybe the Slavic word is a direct borrowing from Gothic diups (deep) as there are plenty of direct Gothic loanwords in Slavic (including for example modry, modrzew*, chlew, chleb, druh, drużyna (perhaps also drugi) and perhaps even mleko)
*modry is a name of a blue colour now - but originally it was a name for red or blueish red colour - Gothic 'madr' - enraged, mad (so also red in face) - the old sense of modry is retained in Silesian 'modra kapusta' which is 'czerwona kapusta' in general Polish but also in 'modrzew' (larch) - it is most probably things like 'czerwona kapusta' (red cabbage) that actually caused the 'modry' to change it's meaning - modrzew was simply a modrodrzew - but it hardly makes sense if you think of modry as blue - but makes a lot of sense when 'modry' is red as larch wood is distincly red hue - btw larch wood was the most prized by old Poles - most of the wooden houses were built of it - in contrast to other conifer tree's wood it is very durable and ages very well in the air (know if first hand -not that I built anything from it) - I also guess that it does not change shape when drying out as our pine wood often does
and finally - read the this:
etymonline.com/index.php?term=deep&allowed_in_frame=0 (etymology of the 'deep' word)
oh there is another thing I would like to add - when talking about Gothic-Slavic language contact (which as we can see was quite alive) it pretty much defines the area ProtoSlavs lived in the time of contact as we can quite readily reconstruct the migration of the Goths (and the Gepids) from written records and archeology