SK

He put this concluding question with a wink of such astounding significance, that Little Jim could only reply with another “sk!”

Little Jim replied by a sound which can only be represented by the letters “sk,” pronounced in the summit of the nose.

White (the color), ska̍la (sk with the point of the tongue).

The day was fine and warm, a bright sun was shining, and the Sk at the time when we entered it was a various and animated scene.

Moving to the "reason" column on this page, we have here an entry of 27 October 1957, which is abbreviated, "To Sk."