echocardiograph

Etymology tree
Proto-Indo-European *sweh₂gʰ-der.
Proto-Hellenic *wākʰā́
Ancient Greek ἠχή (ēkhḗ)
Proto-Indo-European *-ṓy
Ancient Greek -ώ (-ṓ)
Ancient Greek ἠχώ (ēkhṓ)der.
English echo-
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)
Ancient Greek -γρᾰ́φος (-grắphos)der.
English -graph
English cardiograph
English echocardiograph
From echo- + cardiograph.