noun, masculine/sɛʁ.mɑ̃/plural: serments
oath, pledge
“prestation de serment”
Related: assermenter
Inherited from Middle French serement (1415, Charles d'Orléans), from Old French sairement (twelfth century), from earlier sagrament (842, Serments de Strasbourg), from Latin sacramentum. Doublet of sacrement.