Any language, explain what it means if it’s not English.
For example (as a non-native speaker) I’ve always liked the English word ‘unprecedented’, mostly in the context of fiction. Especially if it paints some entity to be really mystical or wondrous or it’s own never before seen order of magnitude in any way.
I love the word helicopter, because unobviously, the root words aren’t heli and copter, but are “helico”, meaning spiral, and “pter”, meaning wing.