Succulent

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early 17th century: from Latin succulentus, from succus ‘juice’.

wiktionary

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Borrowed from French succulent, from Latin succulentus.

etymonline

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succulent (adj.)

c. 1600, from French succulent (16c.), from Latin succulentus "having juice, juicy," from succus "juice, sap;" related to sugere "to suck," and possibly cognate with Old English socian "to soak," sucan "to suck" (see sup (v.2)). The noun meaning "plant with juicy tissues" is from 1825.