English
proppant
From prop + -ant.
A compound of prop + -ant
Middle English proppe ‘a prop, support, support for a vine or plant’
English prop
Today it means
noun Sand or similar particulate material suspended in water or other fluid and used in hydraulic fracturing (fracking) to keep fissures open.
Language periods are conventional ranges, not dates for this word.
Etymograph / proppant