diphosphorus

Etymology tree
Proto-Indo-European *dwóh₁
Proto-Indo-European *dwi-
Proto-Hellenic *dwi-
Ancient Greek δῐ- (dĭ-)bor.
Latin di-bor.
English di-
Proto-Indo-European *bʰeh₂-
Proto-Indo-European *bʰéh₂os
Proto-Hellenic *pʰáwos
Ancient Greek φᾰ́ος (phắos)
Ancient Greek φῶς (phôs)
Ancient Greek -φόρος (-phóros)
Ancient Greek φωσφόρος (phōsphóros)bor.
Latin phōsphorusbor.
English phosphorus
English diphosphorus
From di- + phosphorus.