phonocardiograph

Etymology tree
Proto-Indo-European *bʰeh₂-der.
Proto-Hellenic *pʰōnā́
Ancient Greek φωνή (phōnḗ)der.
English phono-
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 phonocardiograph
From phono- + cardiograph.