Where does “saltpetre” come from?

saltpetre (Middle English) comes from Old French salpetre, from Medieval Latin salpetra, from Latin sāl petrae.

Ancestry of “saltpetre”, step by step

StepLanguageWordMeaning
1Old Frenchsalpetre—
2Medieval Latinsalpetra—
3Latinsāl petrae—

Words derived from “saltpetre”

Every word from Latin sāl petrae →Every word from Medieval Latin salpetra →Every word from Old French salpetre →