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 15c., "a sacrificing, sacrificial killing" (originally especially with reference to Christ), from Old French immolacion "offering, sacrifice" (13c.) or directly from Latin immolationem (nominative immolatio) "a sacrificing," noun of action from past participle stem of immolare "to sacrifice" (see immolate).
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<a href="https://www.etymonline.com/word/self-immolation">Etymology of self-immolation by etymonline</a>
Harper, D. (n.d.). Etymology of self-immolation. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/self-immolation