echography

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 *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 echography
From echo- + -graphy.