unthought-of

It was evident that this hitherto unthought-of explanation had a remarkable effect upon Mr. Overton.

The past was suddenly cut off from the future by this dreadful unthought-of event.

Suggestions of horrible unthought-of evil seemed lurking everywhere in the noiseless blackness of the night.

Most of us in the evening discovered, unpleasantly enough, forgotten pears in unthought-of pockets.

Suddenly a hitherto unthought-of possibility flashed into the boy's mind, and leaving his work he came back to the bunk.