único,-a, only.
unido,-a, united; los Estados Unidos, the United States.
universidad, f., university.
uno,-a, one; —s, some, a pair; as indef. pron., one, they, people.
Uruguay, m., Uruguay.
usar, to use, practice, make use of.
uso, m., use, custom, fashion.
usted, (see V.), you.
usurero, m., usurer.
útil, useful.