syllabic nasals and liquids in IE

reading about IE syllabic nasals and liquids "l.", "r." "m." and "n."
I came to observe some words . For some of them I need a little help
since I do not possed a Bulgarian Etymological Dicitonary ( I assume
there is a such one if one think at the Bulgarian emerit shcolars as
Decev, Georgiev, Duridanov etc;)

The word I ask here for is Bulgarian "glaki". Is this one a common
Slavic word which can be traced back to *galki or what is known about
this word?

Alex