From Middle English satisfyen, satisfien, from Old French satisfiier, satisfier (also Old French satisfaire), from Latin satisfacere, present active infinitive of satisfaciō, from satis ("enough, sufficient") + faciō ("I make, I do").

• IPA: /ˈsætɪsfaɪ/

satisfy (satisfies, present participle satisfying; simple past and past participle satisfied)

1. (ambitransitive) To do enough for; to meet the needs of; to fulfill the wishes or requirements of.

   I’m not satisfied with the quality of the food here.

   • 1667, John Milton, “Book IX”, in Paradise Lost. […], London: […] [Samuel Simmons], and are to be sold by Peter Parker […]; [a]nd by Robert Boulter […]; [a]nd Matthias Walker, […], →OCLC ↗; republished as Paradise Lost in Ten Books: […], London: Basil Montagu Pickering […], 1873, →OCLC ↗:

     Death shall […] with us two / Be forced to satisfy his ravenous maw.

2. (transitive) To cause (a sentence) to be true when the sentence is interpreted in one's universe.

   The complex numbers satisfy \exists x:x^2+1=0.

3. (dated, literary, transitive) To convince by ascertaining; to free from doubt.
   • 1851 November 13, Herman Melville, chapter 19, in Moby-Dick; or, The Whale, 1st American edition, New York, N.Y.: Harper & Brothers; London: Richard Bentley, →OCLC ↗:

     I was resolved to satisfy myself whether this ragged Elijah was really dogging us or not, and with that intent crossed the way with Queequeg, and on that side of it retraced our steps.

4. (transitive) To pay to the extent of what is claimed or due.

   to satisfy a creditor

5. (transitive) To answer or discharge (a claim, debt, legal demand, etc.); to give compensation for.

   to satisfy a claim or an execution

• (antonym(s) of “meet needs, fulfill”): disappoint
• dissatisfy
• satisfy oneself

• satisfaction
• satisfactory
• satisfice
• satiate
• satiation
• satiety

• French: satisfaire
• German: befriedigen, zufriedenstellen
• Italian: soddisfare, accontentare, saziare
• Portuguese: satisfazer
• Russian: удовлетворя́ть
• Spanish: satisfacer