Slate

llicorella

(fine-grained homogeneous sedimentary rock)

llosa

(piece of such stone used as a tile for flooring, roofing, etc.; such tiles collectively; material from which they are made)

pissarra

(piece, originally of certain types of stone and now of other materials, often in a frame, used for writing on)

pissarra

(fine-grained homogeneous sedimentary rock)

vituperar

(to criticize or critique (an author or a work) harshly)