How to Use "undone" with Example Sentences

1. A knot that came undone meant automatic failure .
2. Many of us go through life with an array of undone tasks large and small nibbling at our conscience .
3. Bathsheba 's bedroom window was open , and looking out of it was a hand-some man , with his red jacket undone .
4. The professor has undone his top button , poured himself a nice drink and settled down to share a lifetime of first-class war stories .