thoughtograph

Etymology tree
Proto-Indo-European *teng-der.
Proto-Germanic *þankijaną
Proto-Germanic *þanhtaz
Proto-West Germanic *þą̄ht
Old English þōht
Middle English thought
English thought
Proto-Indo-European *bʰeh₂-
Proto-Indo-European *bʰéh₂os
Proto-Hellenic *pʰáwos
Ancient Greek φᾰ́ος (phắos)
Ancient Greek φῶς (phôs)
Ancient Greek φωτο- (phōto-)der.
English photo-
Proto-Indo-European *gerbʰ-
Proto-Hellenic *grə́pʰō
Ancient Greek γράφω (gráphō)
Ancient Greek -γρᾰ́φος (-grắphos)der.
English -graph
English photograph
blend
English thoughtograph
Blend of thought + photograph.