| BUCENTAURS | • bucentaurs n. Plural of bucentaur. • BUCENTAUR n. (Italian) a state barge of Venice from which the Doge dropped a ring into the sea. |
| NURTURABLE | • nurturable adj. Able to be nurtured. • NURTURABLE adj. that can be nurtured. |
| SUBNUCLEAR | • subnuclear adj. (Physics) Smaller than or occurring in an atomic nucleus. • subnuclear adj. (Biology) Smaller than or occurring in a cell nucleus. • SUBNUCLEAR adj. of, relating to, or being a particle smaller than the atomic nucleus. |
| UNAMUSABLE | • unamusable adj. Not amusable. • UNAMUSABLE adj. not able to be amused. |
| UNARGUABLE | • unarguable adj. Not arguable; that cannot be reasonably argued against. • unarguable n. Such a situation. • UNARGUABLE adj. that cannot be disputed. |
| UNBURNABLE | • unburnable adj. That is difficult or impossible to burn. • UNBURNABLE adj. that cannot be burned. |
| UNCLUBABLE | • unclubable adj. Alternative spelling of unclubbable. • UNCLUBABLE adj. unsociable, not suitable for taking to a club, also UNCLUBBABLE. |
| UNCURBABLE | • uncurbable adj. Incapable of being curbed. • UNCURBABLE adj. not capable of being curbed. |
| UNEDUCABLE | • uneducable adj. Incapable of being educated. • UNEDUCABLE adj. not educable. |
| UNLABOURED | • unlaboured adj. (British spelling) Not laboured. • UNLABOURED adj. not laboured, also UNLABORED. |
| UNQUOTABLE | • unquotable adj. Not quotable; that cannot be quoted. • UNQUOTABLE adj. not quotable. |
| UNRUFFABLE | • unruffable adj. (Archaic) imperturbable. • UNRUFFABLE adj. (Dickens) imperturbable. |
| UNSUITABLE | • unsuitable adj. Not suitable; unfit; inappropriate. • UNSUITABLE adj. not suitable. |
| UNTUNEABLE | • untuneable adj. Alternative form of untunable. • UNTUNEABLE adj. that cannot be tuned, also UNTUNABLE. |
| UNTURNABLE | • unturnable adj. Not turnable. • UNTURNABLE adj. that cannot be turned. |
| UNVALUABLE | • unvaluable adj. (Obsolete) Invaluable; beyond price. • unvaluable adj. (Rare) Not valuable; having little value. • UNVALUABLE adj. not valuable. |
| UPBUOYANCE | • upbuoyance n. (Rare) The act of buoying up; uplifting. • UPBUOYANCE n. the act of buoying up. |