I hate when the word "little" doesn't work in any of the sentences with the word kicsi.
kicsi is little too, not only small.
Really should be accepted for very. Highly and rather as well.
I would say that rather goes with fairly and pretty and that those are all less than very or really or extremely.
Highly fast just sounds wrong to me. Highly unlikely, yes.
Yes, I mean generally more adjectives should be accepted. Highly does not work here.
I have smth that is small, green and fast. #ifuknowhatimean
Here "little" was accepted for "kicsi" in another question it was not