Molasses

google

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mid 16th century: from Portuguese melaço, from late Latin mellacium ‘must’, based on mel ‘honey’.

wiktionary

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From French mélasse or Portuguese melaço (compare Spanish melaza), all from Late Latin mellāceus(“honeylike, honey-sweet”), from Latin mel(“honey”). See mellifluous.

molasses

etymonline

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molasses (n.)

"uncrystallized syrup produced in the manufacture of sugar," 1580s, from Portuguese melaço, from Late Latin mellaceum "new wine," properly neuter of mellaceus "resembling honey," from Latin mel (genitive mellis) "honey" (from PIE root *melit- "honey"). Adopted in English in plural form and generally remaining so, but regarded as a singular noun.