electrocardiographical

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 γράφω (gráphō) Proto-Indo-European *-h₂ Proto-Indo-European *-éh₂ 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 Proto-Indo-European *-ikos Proto-Italic *-ikos Latin -icuslbor. Old French -iquebor. Middle English -ic Proto-Indo-European *h₂el-der.? Proto-Italic *-ālis Latin -ālisbor. Old French -albor. ▲ Latin -ālis Old French -elbor. ▲ Latin -ālisbor. Middle English -al Middle English -ical English -ical English electrocardiographical From electrocardiography + -ical.

来源：wiktionary