<title type="display">unteachable</title> adjective [person] incapaç d'aprendre res, que no se li pot ensenyar res.
<title type="display">unthinkable</title> Pronúncia: ˈʌnˈθɪŋkəbəl adjective impensable, inconcebible. it is unthinkable that... és inconcebible que + subjuntiu
<title type="display">unthread</title> transitive verb [cloth] desfilar, descosir. [pearls, needle] desenfilar.