dogma, doxa, opinion: dogma, dogmatic, heterodox.
dosis, a giving; dotos, given: dose, anti-dote, an-ec-dot-al.
draō, I do: dra-ma, drastic.
dromos, running: dromedary, hippo-drome, aero-drome.
dunamis, power, force: dynamic.
Eidos, form; eidōlon, image; idea, form, look (all from id-, see): ideograph, idol, kal-eido-scope.
eikōn, image: icon, iconoclast.
electron, amber: electric, electrify.
ergon, work; en-ergeia, energy: organ-ize, en-ergetic, metall-urgy.