Ancient Greek ταχυ-ον < PIE *dʰn̥gʰu-om > PGmc *dungu-ą > OE dung > ModE dung /dʊŋ/

(Sorry about the slow update schedule recently. I’ve been having some problems with Tumblr, and I may need to relocate this blog. I’ll try to keep you posted.)

Ancient Greek form: Did not exist as such, but is rather a modern form based on analogy to proton (πρῶτον) and neutron (νεῦτρον). I have interpreted the PGmc form accordingly, although it doesn’t matter—final a-loss would syllabify *w anyway.

Proto-Indo-European form: Hypothetical, and apparently based on only one (Lithuanian) cognate déngti.

Old English form: The second /u/ is lost after a heavy syllable, making this word identical to *dungō (but with presumably different inflection.)