Below are the words that matched your query...
Uncombable
- not capable of being combed
Untimbered
- lacking timbers; "an untimbered boat"
- without trees; "an untimbered area"
Untipped
- not provided with a special tip; "untipped cigarettes"
Unbearable
- incapable of being put up with; "an intolerable degree of sentimentality"
Unendurable
- incapable of being put up with; "an intolerable degree of sentimentality"