sat·is·fac·tion
/ˌsadəsˈfakSH(ə)n/
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noun
noun: satisfaction; plural noun: satisfactions
fulfillment of one’s wishes, expectations, or needs, or the pleasure derived from this.
“he smiled with satisfaction”
synonyms: contentment, contentedness, content, pleasure, gratification, fulfillment, happiness, sense of well-being, pride, sense of achievement, delight, joy, enjoyment, relish, triumph;More
self-satisfaction, smugness, complacency;
archaicself-content
“he smiled with satisfaction”
antonyms: dissatisfaction, displeasure, discontentLAW
the payment of a debt or fulfillment of an obligation or claim.
“in full and final satisfaction of the claim”
synonyms: compensation, recompense, reparation, restitution, repayment, payment, settlement, reimbursement, indemnification, indemnity, damages; More
redress, amends, atonement;
justice;
requital, retribution;
quid pro quo
“investors may have to turn to the courts for satisfaction”
You did say that, according to definitions of satisfaction. Necessity does not have to involve satisfaction or pleasure. What if one hates drinking water but they need to drink it? It’s value attribution, making a conscious choice to value other things over that continually present dissatisfaction, which is a will that is free in contextual valuing.
My sacrifice for a child is not for my satisfaction, it’s for the child’s. Which is necessary, not tied to any pleasure for me. Which is why it would be my ‘sacrifice’. There is no satisfaction in death, remember, satisfaction comes -after- the choice or action is made or happens during, so if death happens during, how am I to have that greater satisfaction at all? I wouldn’t because it was never for ‘my own’ greater satisfaction to begin with
ne·ces·si·ty
/nəˈsesədē/
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noun
noun: necessity; plural noun: necessities
1.
the fact of being required or indispensable.
“the necessity of providing parental guidance should be apparent”
synonyms: essential requirement, prerequisite, indispensable thing/item, essential, requisite, necessary, fundamental, basic; More
sine qua non, desideratum
“health should not be considered a privilege or even a luxury, but as a necessity and a right”
indispensability, need, needfulness
“the necessity of taking expert advice”
unavoidability.
“the necessity of growing old”
synonyms: inevitability, unavoidability, certainty, inescapability, inexorability, ineluctability
“the necessity of growing old”
a state of things or circumstances enforcing a certain course.
“created more by necessity than design”
synonyms: force/pressure of circumstance, need, obligation, call, exigency; More
crisis, emergency, urgency;
force majeure
“political necessity forced him to consider it”
2.
an indispensable thing.
“a good book is a necessity when traveling”
synonyms: essential requirement, prerequisite, indispensable thing/item, essential, requisite, necessary, fundamental, basic; More
sine qua non, desideratum
“health should not be considered a privilege or even a luxury, but as a necessity and a right”
Doesn’t say pleasure or satisfaction linked to need Or necessity/necessary.