The story
- GermanMethy
- Englishme(thyl)
- Englishchlor(o)eth(yl)
- Ancient GreekᾸ̓́μμων (Ắmmōn)
- LatinAmmōn
- Latinammoniacus
- Englishammonia
- Englishamine
- English todaymechlorethamine
From me(thyl) + chlor(o)eth(yl) + -amine.
Etymology from Wiktionary, CC BY-SA 4.0.