| 🇬🇧 Palabra en inglés | 🇪🇸 Palabra en español | Tipo | Pronunciación |
| ultimate | último en | NOUN | |
| ultimately | última instancia | ADVERB | |
| unaffordable | inasequible | ADVERB | |
| unattractive | atractivo | ADVERB | |
| unavailable | disponible | ADVERB | |
| unavoidable | inevitable | ADVERB | |
| uncertainty | incertidumbre | NOUN | |
| uncertainty | incertidumbre | ADVERB | |
| uncomfortable | incómodo | ADVERB | |
| uncomfortably | incómodamente | ADVERB | |
| uncommon | común | ADVERB | |
| unconventional | convencional | ADVERB | |
| uncover | descubra | VERB | |
| undeniable | innegable | VERB | |
| underestimate | subestime | VERB | |
| undergo | visite | VERB | |
| underpaid | pagado | VERB | |
| understand | comprender | VERB | |
| understandably | comprensiblemente | ADVERB | |
| undertake | emprender | VERB | |
| unemployed | desempleado | NOUN | |
| unfold | desplegar | VERB | |
| unforeseen | imprevisto | VERB | |
| unhelpful | útil | VERB | |
| unique | único | VERB | |
| unit | unidad | NOUN | |
| unite | unir | NOUN | |
| unity | unidad | NOUN | |
| universally | universalmente | ADVERB | |
| unjustified | injustificada | ADVERB | |
| unknown | desconocido | NOUN | |
| unload | descargar | VERB | |
| unmarried | soltero | VERB | |
| unnecessarily | innecesariamente | ADVERB | |
| unnoticed | desapercibido | ADVERB | |
| unpaid | pagar | ADVERB | |
| unpleasant | desagradable | ADVERB | |
| unproductive | improductivo | ADVERB | |
| unprofessional | profesional | ADVERB | |
| unqualified | reservas | ADVERB | |
| unquestionably | incuestionablemente | ADVERB | |
| unreal | irreal | ADVERB | |
| unreasonably | irrazonablemente | ADVERB | |
| unrelated | relación | ADVERB | |
| unsafe | inseguro | ADVERB | |
| unsolved | resolver | ADVERB | |
| unspoiled | virgen | ADVERB | |
| unsuccessfully | éxito | ADVERB | |
| unthinkable | impensable | ADVERB | |
| untouched | intacto | ADVERB | |
| untrue | falso | ADVERB | |
| unwanted | deseado | ADVERB | |
| unwillingly | involuntariamente | ADVERB | |
| unwillingness | de voluntad | ADVERB | |
| unwillingness | de voluntad | NOUN | |
| unwind | desenrollar | ADVERB | |
| up | arriba | PREPOSITION | |
| upcoming | Próximamente | PREPOSITION | |
| upper-class | alta | PREPOSITION | |
| upward | arriba | PREPOSITION | |
| upwards | arriba | ADVERB | |
| urge | urge | VERB | |
| usage | utilice | NOUN | |
| usefulness | utilidad | NOUN | |
| utmost | máxima | NOUN | |
| utterly | totalmente | ADVERB | |
