dibutyl

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 *gʷṓws
Proto-Hellenic *gʷous
Ancient Greek βοῦς (boûs)
Proto-Indo-European *tewh₂-
Proto-Indo-European *-rós
Proto-Indo-European *tuh₂rós
Proto-Hellenic *tūrós
Ancient Greek τῡρός (tūrós)
Ancient Greek βούτῡρος (boútūros)der.
English but-
Proto-Indo-European *swel-der.?
Ancient Greek ῡ̔́λη (hū́lē)der.
Frenchder.
English -yl
English butyl
English dibutyl
From di- + butyl.