pumice
UK[ˈpʌmɪs]US[ˈpʌmɪs]
n
a very light, porous, volcanic rock used especially for smoothing surfaces or as an abrasive.
Etymology
the word "pumice" entered english in the late 15th century from the old french "pomis," which itself derived from the latin "pumex, pumic-." the latin term is believed to have a pre-latin, possibly mediterranean substrate origin, indicating the material's long history of use. the core meaning has remained remarkably consistent, referring specifically to the light, frothy volcanic glass formed by the rapid cooling of gas-rich lava. its primary functional association—as an abrasive for smoothing and polishing—has been intrinsic to the word since its classical latin usage, directly linking the ancient material to its modern application.
Analysis
this word is a simplex loanword. its spelling and form were borrowed directly into english.
Examples
she used a piece of pumice to smooth the rough skin on her feet.
the volcanic island's shores were covered with black sand and chunks of gray pumice.
pumice is a key ingredient in some abrasive cleaning products.