This list contains all the adverbs used in the English language that start with U. It includes negative and positive adverbs with U to describe a person.
| Uglily | Ulteriorly | Ultimately |
| Umquhile | Unabashedly | Unaccountably |
| Unaccustomedly | Unaffectedly | Unaggressively |
| Unambiguously | Unambitiously | Unamiably |
| Unamicably | Unamusedly | Unanimously |
| Unannounced | Unapologetically | Unappetizingly |
| Unappreciatively | Unarguably | Unashamedly |
| Unassumingly | Unathletically | Unattractively |
| Unavoidably | Unawares | Unbearably |
| Unbecomingly | Unbelievably | Unbelievingly |
| Unbelligerently | Unbendingly | Unbeware |
| Unbiasedly | Unblinkingly | Unblushingly |
| Uncannily | Unceremoniously | Uncertainly |
| Unchangingly | Uncharacteristically | Uncharitably |
| Unchastely | Uncheerfully | Unchivalrously |
| Unciatim | Uncivilly | Unclearly |
| Uncleverly | Unco | Uncomfortably |
| Uncommonly | Uncommunicatively | Uncompetitively |
| Uncomplainingly | Uncompliantly | Uncomplicatedly |
| Uncomprehendingly | Uncompromisingly | Unconcernedly |
| Unconditionally | Uncongenially | Unconsciously |
| Unconsolably | Uncontrollably | Unconvincedly |
| Unconvincingly | Uncooperatively | Uncoordinatedly |
| Uncordially | Uncourageously | Uncouthly |
| Uncritically | Unctuously | Unctuousnessly |
| Uncurably | Undauntedly | Undecidedly |
| Undecipherably | Undefeatedly | Undeniably |
| Under | Underboard | Underfoot |
| Underground | Underhand | Underhandedly |
| Underneath | Understandably | Understandingly |
| Understatedly | Undeservingly | Undignifiedly |
| Undirectly | Undistractedly | Undividedly |
| Undoubtedly | Undulatingly | Unduly |
| Uneasily | Unemotionally | Unendingly |
| Unenlightenedly | Unenthusiastically | Unenviously |
| Unequally | Unequivocally | Unerringly |
| Unethically | Unevenly | Unexpectedly |
| Unexpertly | Unfailingly | Unfairly |
| Unfaithfully | Unfalteringly | Unfamiliarly |
| Unfashionably | Unfavorably | Unfavourably |
| Unfazedly | Unfearingly | Unfeelingly |
| Unfemininely | Unflaggingly | Unflappably |
| Unflickeringly | Unflinchingly | Unfocusedly |
| Unforgetfully | Unforgivingly | Unfortunately |
| Ungainly | Ungallantly | Ungenerously |
| Ungenially | Unglamourously | Ungraciously |
| Ungratefully | Ungrudgingly | Unguardedly |
| Unguiltily | Unhaltingly | Unhappily |
| Unharmoniously | Unhealthily | Unheedingly |
| Unhelpfully | Unheroically | Unhesitantly |
| Unhesitatingly | Unhurriedly | Uniaxially |
| Uniformly | Unilaterally | Unimaginatively |
| Unimpeachably | Unimportantly | Unimposingly |
| Unimpressedly | Unimpressively | Unindulgently |
| Uninformatively | Uninhibitedly | Uninquisitively |
| Uninspiredly | Unintelligently | Unintelligibly |
| Unintentionally | Uninterestedly | Uninterruptedly |
| Uninvitedly | Uninvitingly | Uniquely |
| Unitedly | Unitively | Universally |
| Univocally | Unjustly | Unkindly |
| Unknowingly | Unlawfully | Unlike |
| Unluckily | Unmanfully | Unmelodiously |
| Unmercifully | Unmindfully | Unmotivatedly |
| Unmovably | Unmovingly | Unmusically |
| Unnaturally | Unnear | Unnecessarily |
| Unnervedly | Unnervingly | Unnethe |
| Unnethes | Unnobly | Unobservantly |
| Unobservedly | Unobtrusively | Unofficially |
| Unoften | Unorthodoxly | Unostentatiously |
| Unperturbedly | Unpleasantly | Unpoetically |
| Unprecedentedly | Unpredictably | Unpreparedly |
| Unpretentiously | Unprobably | Unproductively |
| Unprofessionally | Unproficiently | Unpropitiously |
| Unprotectedly | Unquestionably | Unquestioningly |
| Unquietly | Unreadably | Unrealistically |
| Unreally | Unreasonably | Unreceptively |
| Unrefinedly | Unregretfully | Unrelatedly |
| Unrelentingly | Unreliably | Unreluctantly |
| Unremorsefully | Unrepentantly | Unrequitedly |
| Unreservedly | Unresponsively | Unrestrainedly |
| Unrevealingly | Unrhythmically | Unromantically |
| Unruffledly | Unsatiably | Unsatisfactorily |
| Unsatisfiedly | Unscrupulously | Unseasonably |
| Unseeingly | Unseen | Unseldom |
| Unselfconsciously | Unselfishly | Unsettledly |
| Unsettlingly | Unshakably | Unskillfully |
| Unsmilingly | Unsociably | Unsolicitously |
| Unsparingly | Unspeakingly | Unsteadily |
| Unstintingly | Unstoppably | Unsubmissively |
| Unsubtly | Unsuccessfully | Unsuitably |
| Unsurely | Unsurprisedly | Unsurprisingly |
| Unsuspectingly | Unswervingly | Unsymmetrically |
| Unsympathetically | Unsystematically | Untangibly |
| Unthinkingly | Unthreateningly | Untidily |
| Unto | Untruly | Untrustingly |
| Untruthfully | Unusually | Unvirtuously |
| Unvisibly | Unwantedly | Unwares |
| Unwarily | Unwaveringly | Unwelcomingly |
| Unwillingly | Unwisely | Unwittingly |
| Unwontedly | Unworthily | Unyieldingly |
| Up | Uptopar | Up-and-down |
| Upbeat | Up-front | Uphill |
| Upliftingly | Uppermost | Uppishly |
| Upright | Uprightly | Upriver |
| Uproariously | Upsetly | Upside-down |
| Upstairs | Upstate | Upstreet |
| Uptill | Upward | Upwardly |
| Upwards | Urbanely | Urgently |
| Usefully | Usefullyvaliantly | Uselessly |
| Usually | Usuriously | Usurpingly |
| Utter | Utterly | Uxoriously |
