block (n.) 
"solid piece," c. 1300, from Old French bloc "log, block" of wood (13c.), via
Middle Dutch bloc "trunk of a tree" or Old High German bloh, from a common
Germanic source, from PIE *bhlugo-, from *bhelg- "a thick plank, beam" (see
balk).
...............................
Gary Roberts
http://toolemera.com

"I'ld rather read a good book, than write a poor one." Christopher Morley