hexafluronium

Etymology tree
Proto-Indo-European *swéḱs
Proto-Hellenic *hwéks
Ancient Greek ἕξ (héx)
Ancient Greek ἑξα- (hexa-)der.
Latin hexa-der.
English hexa-
English hex-
Proto-Indo-European *-nós
Proto-Italic *-nos
Latin -nus
Latin -ānusder.
English -ane
English hexane
English fluorene
Proto-Indo-European *swel-der.?
Ancient Greek ῡ̔́λη (hū́lē)der.
Frenchder.
English -yl
English fluorenyl
New Latin ammōniumbor.
English ammonium
English onium
English -onium
English hexafluronium
From hexa(ne) + flu(o)r(enyl) + -onium (“quaternary ammonium compound”).