hastighet

As a native speaker of a language that’s unlike anything, I envy you folks so much. Knowing enough English and German you just look at it, and go ‘aaah, speediness’ (I guess the ‘hast’/‘hastig’ bit is the same as ‘haste’/‘hasty’ in English, and the ‘het’ is the same as ‘heit’ /~ness’/ in German).

You wouldn’t guess the word, reading it in context is so much easier.