Potent

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late Middle English: from Latin potent- ‘being powerful, being able’, from the verb posse .

wiktionary

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From Middle English potent, borrowed from Latin potens, potentis(“powerful, strong, potent”), present participle of posse(“to be able”), from potis(“able, powerful, originally a lord, master”).

etymonline

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potent (adj.)

early 15c., "mighty, very powerful, possessed of inherent strength," from Latin potentem (nominative potens) "powerful," present participle of *potere "be powerful," from potis "powerful, able, capable; possible;" of persons, "better, preferable; chief, principal; strongest, foremost," from PIE root *poti- "powerful; lord." Meaning "having sexual power, capable of orgasm in sexual intercourse" (of men) is recorded by 1893.