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bleck

vb. 1 (context obsolete dialect English) To blacken. 2 (context obsolete dialect English) To defile.

The Collaborative International Dictionary

Bleck

Bleck \Bleck\, Blek \Blek\, v. t. To blacken; also, to defile. [Obs. or Dial.]
--Wyclif.

Usage examples of "bleck".

I see um--shoor der boole mit der bleck star bei der vorehead in der middle oaf.