Chalk

Part of speech: noun, verb

Pronunciation: /t͡ʃɔːk/

Definitions

1. A soft white or colored sedimentary rock composed of calcium carbonate, commonly used for writing on blackboards or marking surfaces
2. A porous and soft sedimentary material primarily made of calcium carbonate, typically employed in educational settings for writing on blackboards or for artistic activities
3. A fine-grained, soft rock made primarily of calcium carbonate, often utilized in educational environments for writing or as a medium for art

Etymology: Chalk is one of the few English words that came into the language twice, once by a long detour through Germanic and once more directly from Latin. The Latin word "calx" meant "limestone," and it was itself borrowed from Ancient Greek "khálix," meaning "pebble." So the rock beneath our feet was named for a small stone you might pick up off a beach. The English form descends from Old English "ċealc," which passed through Proto-West Germanic "*kalk" before settling into Middle English as "chalk." Because "calx" later returned to English as a separate loanword, the two words became doublets: related forms that took different routes into the language. The second one kept the older Latin sense of lime and calcium compounds, while "chalk" stayed attached to the soft white rock itself.

Synonyms: limestone, calcium carbonate, crayon, writing tool, marker