arithmétique

arithmetic (mathematics of numbers, etc.)

Inherited from Old French arismetique, borrowed from Latin arithmētica (“arithmetic”), itself borrowed from Ancient Greek ἀριθμητική (arithmētikḗ), ellipsis of ἀριθμητικὴ τέχνη (arithmētikḕ tékhnē, “art of counting”), from ἀριθμός (arithmós, “number”). Attested circa 1150.

arithmetic, arithmetical

Related: arithmétiquement, moyenne arithmétique

Learned borrowing from Latin arithmeticus (“arithmetical”), itself borrowed from Ancient Greek ἀριθμητικός (arithmētikós, “arithmetical”). Attested circa 1370.