unir, to unite, connect, bring (or hold) together.
universo, m., universe.
un(o), -na, one; uno y otro, each (one), both; ciento por uno, a hundred fold.
uña, f., nail (of finger or toe), claw.
usar, to use; usar de, to make use of.
uso, m., use; al uso, after the fashion.
usted (plur., ustedes), you.
usura, f., interest, usury.
utilizar, to make use of, utilize.
uva, f., grape.