The roads were slick during the storm. Veiene var glatte under uværet.
1 looking or sounding too good to be true -- sleip
slick advertising snedig reklame
2 clever especially in a sly or dishonest way; smart -- glatt, sleip
That was a very slick move!
3 (also oil-slick) a broad band of oil floating on the surface of the sea etc -- oljeflak
An oil-slick is threatening the coast.