sachet: [19] A sachet is etymologically a ‘little sack’. The word was borrowed from French sachet, a diminutive form of sac ‘bag’, which came from the same Latin source that produced English sack. Sac itself was acquired by English as a biological term in the 18th century. => sack
"small perfumed bag," 1838, from French sachet (12c.), diminutive of sac (see sac). A reborrowing of a word that had been used 15c. in the sense "small bag, wallet."
