chalk
chalk
noun
A soft, white, porous sedimentary rock, mainly calcium carbonate, used for writing or building.
"The white cliffs are made of chalk."
verb
To write, draw, or mark something using a piece of chalk.
"She chalked a diagram on the board."
Thesaurus
Synonyms: trash, glass, methamphetamine, crank, shabu, Methedrine, deoxyephedrine, ice, chicken feed, meth, methamphetamine hydrochloride