*melit-

1725, "burnt sugar," from French caramel "burnt sugar" (17c.), from Old Spanish caramel (modern caramelo), which is of uncertain origin, probably ultimately from Medieval Latin cannamellis, which is traditionally from Latin canna (see cane (n.)) + mellis, genitive of mel "honey" (from PIE root *melit- "honey"). But some give the Medieval Latin word an Arabic origin, or trace it to Latin calamus "reed, cane."

The word was being used by 1884 of a dark-colored creamy candy and by 1909 as a color-name.

1530s, "preserve or confection of pulpy consistence made from quince," from French marmelade, from Portuguese marmelada "quince jelly, marmalade," from marmelo "quince," by dissimilation from Latin melimelum "sweet apple," originally "fruit of an apple tree grafted onto quince," from Greek melimelon, from meli "honey" (from PIE root *melit- "honey") + mēlon "apple" (see malic). Extended 17c. to any preserve or confection of pulpy consistence made from a citrus fruit. As a verb, "to spread with marmalade" by 1963. 

I marmaladed a slice of toast with something of a flourish, and I don't suppose I have ever come much closer to saying 'Tra-la-la' as I did the lathering. [P.G. Wodehouse, "Stiff Upper Lip, Jeeves"]