 Another , less widespread theory , is that the Slavic languages have borrowed the word from a Turkic term for " witch " ( e.g. , Tatar <unk> ) . Czech linguist Václav Machek proposes Slovak verb " <unk> sa " ( stick to , thrust into ) , or its hypothetical anagram " <unk> sa " ( in Czech , archaic verb " <unk> " means " to thrust violently " ) as an etymological background , and thus translates " <unk> " as " someone who thrusts , bites " . An early use of the Old Russian word is in the anti @-@ pagan treatise " Word of Saint Grigoriy " ( Russian <unk> <unk> <unk> ) , dated variously to the 11th – 13th centuries , where pagan worship of <unk> is reported . 
