hyperaltruistic

Etymology tree
Proto-Indo-European *úp
Proto-Indo-European *-er
Proto-Indo-European *upér
Proto-Hellenic *hupér
Ancient Greek ῠ̔πέρ (hŭpér)
Ancient Greek ῠ̔περ- (hŭper-)der.
English hyper-
Proto-Indo-European *h₂el-
Proto-Indo-European *h₂élyos
Proto-Italic *aljos
Proto-Indo-European *-teros
Proto-Italic *-teros
Proto-Italic *aliteros
Latin alterī
Vulgar Latin *alterui
Old French autrui
French autrui
Proto-Indo-European *-id-
Proto-Indo-European *-yéti
Proto-Indo-European *-idyéti
Proto-Hellenic *-íďďō
Ancient Greek -ῐ́ζω (-ĭ́zō)
Proto-Indo-European *-mos
Proto-Indo-European *-mós
Ancient Greek -μός (-mós)
Ancient Greek -ῐσμός (-ĭsmós)der.
Latin -ismusbor.
French -isme
French altruismebor.
English altruism
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Ancient Greek -ῐ́ζω (-ĭ́zō)
Proto-Hellenic *-tās
Ancient Greek -τής (-tḗs)
Ancient Greek -ῐστής (-ĭstḗs)bor.
Latin -istader.
Old French -istebor.
Middle English -ist
English -ist
English altruist
Proto-Indo-European *-ikos
Proto-Italic *-ikos
Latin -icuslbor.
Old French -iquebor.
Middle English -ik
English -ic
English altruistic
English hyperaltruistic
From hyper- + altruistic.