bziks

from:

http://members.uk.tripod.de/Groznijat/thrac/thrac_3.html

5. brynchós `guitar for the Thracians' (Hesych.). The word is related
to the Pol. brzek `ringing, tinkle', Ukr. brjak `ringing, sound'.

I hope this won't give Piotr tinnitus. But perhaps one more bzik?

Torsten