This list contains all the adverbs used in the English language that start with i. It includes negative and positive adverbs with i to describe a person.
| Iambically | Ibidem | Icily |
| Idealistically | Ideally | Identically |
| Idiosyncratically | Idiotically | Idly |
| Idolisingly | Ignobly | Ignorantly |
| Illatively | Illegally | Illegibly |
| Ill-humoredly | Illiberally | Illicitly |
| Ill-naturedly | Illogically | Ill-temperedly |
| Illuminatedly | Illusively | Illustratively |
| Imaginatively | Imbalancedly | Imitatively |
| Immaculately | Immaturely | Immeasurably |
| Immediately | Immensely | Imminently |
| Immoderately | Immodestly | Immorally |
| Immortally | Immovably | Immutably |
| Impalpably | Impartially | Impassively |
| Impatiently | Impeccably | Impededly |
| Imperatively | Imperceptibly | Imperfectly |
| Imperially | Imperiously | Impersonally |
| Impertinently | Imperturbably | Impetuously |
| Impiously | Impishly | Implacably |
| Implausibly | Impliably | Implicitly |
| Impliedly | Imploringly | Impolarily |
| Impolitely | Importantly | Importunately |
| Importunely | Imposingly | Impossibly |
| Impotently | Imprecisely | Impressedly |
| Impressionably | Impressively | Imprimis |
| Improbably | Improperly | Improvidently |
| Improvisationally | Imprudently | Impudently |
| Impulsively | Impunibly | Impurely |
| Imputably | In | In addition |
| In comparison | In contrast | In contrast to |
| In fact | In the event | In the same way |
| Inaccurately | Inactively | Inadequately |
| Inadvertently | Inanely | Inappropriately |
| Inaptly | Inarguably | Inarticulately |
| Inasmuch | Inattentively | Inaudibly |
| Inauspiciously | Incapably | Incautiously |
| Incedingly | Incessantly | Incestuously |
| Incidentally | Incidently | Incisely |
| Incisively | Incitingly | Incivilly |
| Inclusively | Incog | Incoherently |
| Incompetently | Incompletely | Incompliantly |
| Incomprehendingly | Incomprehensibly | Inconceivably |
| Inconclusively | Incongrously | Inconsequentially |
| Inconsequently | Inconsiderately | Inconsistently |
| Inconsolably | Inconspicuously | Inconveniently |
| Incoordinately | Incorrectly | Incorrigibly |
| Increasingly | Incredibly | Incredulously |
| Incrementally | Inculpably | Incurably |
| Incuriously | Indebtedly | Indecently |
| Indecisively | Indecorously | Indeed |
| Indefinitely | Indelibly | Indelicately |
| Indentedly | Independently | Indeterminedly |
| Indicatively | Indifferently | Indigently |
| Indignantly | Indignly | Indirectly |
| Indiscernibly | Indiscreetly | Indiscriminately |
| Indiscriminatingly | Indistinctly | Individually |
| Indivisibly | Indolently | Indoors |
| Indulgently | Industrially | Industriously |
| Inebriatedly | Ineffably | Ineffectively |
| Ineffectually | Inelegantly | Ineloquently |
| Ineptly | Inerrably | Inerringly |
| Inertly | Inevitably | Inexactly |
| Inexcusably | Inexorably | Inexperiencedly |
| Inexpertly | Inexpiably | Inexplicably |
| Inexpressively | Infallibly | Infamously |
| Infatuatedly | Infectiously | Inferiorly |
| Infernally | Infinitely | Infirmly |
| Inflexibly | Influentially | Informally |
| Informatively | Infra | Infrequently |
| Infuriatingly | Ingeniously | Ingenuously |
| Ingrately | Ingratiatingly | Inhalingly |
| Inharmoniously | Inherently | Inhospitably |
| Inhumanely | Inhumanly | Inimically |
| Inimitably | Iniquitously | Initially |
| Injudiciously | Injuredly | Inland |
| Innately | Innerly | Innocently |
| Innocuously | Inoffensively | Inopportunely |
| Inordinately | Inquiringly | Inquisitively |
| Insanely | Insatiably | Inscrutably |
| Insecurely | Insensibly | Insensitively |
| Inside | Insidiously | Insightfully |
| Insignificantly | Insincerely | Insinuatingly |
| Insipidly | Insistently | Insociably |
| Insofar | Insolently | Insomuch |
| Insooth | Insouciantly | Inspiredly |
| Inspiringly | Instantaneously | Instantly |
| Instead | Instinctively | Instinctually |
| Instructively | Insubordinately | Insubstantially |
| Insufferably | Insufficiently | Insularly |
| Insultedly | Insultingly | Intangibly |
| Intangily | Integrally | Intelligently |
| Intelligibly | Intemperately | Intendedly |
| Intensely | Intentionally | Intently |
| Interestedly | Interestingly | Interiorly |
| Interminably | Intermittently | Internally |
| Interrogatively | Intimately | Intimidatedly |
| Intimidatingly | Intire | Intolerantly |
| Intoxicatedly | Intoxicatingly | Intractably |
| Intransigently | Intrepidly | Intricately |
| Intriguedly | Intriguingly | Introductorily |
| Introspectively | Introvertedly | Intrusively |
| Intuitively | Inutilely | Invaluably |
| Invariably | Invasively | Invectively |
| Inventively | Inversely | Invertedly |
| Invigoratedly | Invigoratingly | Invincibly |
| Inviolably | Invisibly | Invitingly |
| Involuntarily | Inward | Inwardly |
| Inwards | Inwith | Irascibly |
| Irately | Irenically | Irksomely |
| Ironhandedly | Ironically | Irrationally |
| Irregularly | Irrelevantly | Irreligiously |
| Irrepressibly | Irresistibly | Irresolutely |
| Irresponsibly | Irreverently | Irrevocably |
| Irritably | Irritatedly | Irritatingly |
| Isolatedly | Issuably | Itchily |
| Item | Iwis |
