Etymologies

One thing I find annoying to impossible about Duolingo is that etymology isn't presented with the new vocabulary. I can't comprehend not wanting, or perhaps I should say needing, to see the etymology when you learn a new word. How are you meant to remember them all without the connections between them? Especially in a foreign language that's related to one you know - so any Indo-European one for me - but even with Finnish, since even if not for loan words from IE languages you'd need to make connections among Finnish words. I have actually had some trouble trying to look up etymology for the Welsh words I was getting from Duolingo. Wiktionary seems to have incomplete etymology info for Welsh.