heptaoxide

Etymology tree
Proto-Afroasiatic *sṗɣ?
Proto-Semitic *šabʕ-bor.?
Proto-Indo-European *septḿ̥
Proto-Hellenic *heptə́
Ancient Greek ἑπτᾰ́ (heptắ)bor.
English hepta-
Proto-Indo-European *h₂eḱ-der.?
Ancient Greek ὀξύς (oxús)
Proto-Indo-European *ǵenh₁-
Proto-Indo-European *-os
Proto-Indo-European *ǵénh₁os
Proto-Hellenic *génos
Ancient Greek γένος (génos)
French oxygène
Latin acidusbor.
French acide
blend
French oxidebor.
English oxide
English heptaoxide
From hepta- + oxide.