hyperaltruism

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
English hyperaltruism
From hyper- + altruism.