electrocardiography

Etymology tree
French électro-bor.
Ancient Greek ἤλεκτρον (ḗlektron)bor.
Latin ēlectrum
Latin electro-bor.
English electro-
Proto-Indo-European *ḱerd-
Proto-Indo-European *ḱḗr
Proto-Indo-European *ḱr̥díyeh₂
Proto-Hellenic *kərdíyā
Ancient Greek καρδία (kardía)lbor.
English cardio-
Proto-Indo-European *gerbʰ-
Proto-Hellenic *grə́pʰō
Ancient Greek γρᾰ́φω (grắphō)
Ancient Greek -ᾱ (-ā)
Ancient Greek -η (-ē)
Ancient Greek γραφή (graphḗ)
Ancient Greek -γραφίᾱ (-graphíā)bor.
French -graphieder.
English -graphy
English cardiography
English electrocardiography
From electro- + cardiography.