word forming element indicating "oneself," also "automatic," from Old English use of self (pron.) in compounds, such as selfbana "suicide," selflice "self-love, pride, vanity, egotism," selfwill "free will."
early 14c., "performance of an act set forth by a priest or other Church authority to atone for sin," from Old French satisfaction (12c.), from Latin satisfactionem (nominative satisfactio) "a satisfying of a creditor," noun of action from past participle stem of satisfacere (see satisfy). Senses of "contentment, appeasement" and "action of gratifying" first recorded late 14c.; the former not common before 16c.
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Definitions of self-satisfaction from WordNet
the feeling you have when you are satisfied with yourself;