Browse English Dictionary - I am not my brother's keeper idiom ... -ize - Cambridge Dictionary AI Assistant Dictionary Translate Grammar Thesaurus +Plus Cambridge Dictionary +Plus Games Cambridge Dictionary +Plus My profile +Plus help Log out {{userName}} Cambridge Dictionary +Plus My profile +Plus help Log out Log in / Sign up English (UK) 1 ? true : false } }), searchAutoComplete.changeToLayoutContainer(); tap:AMP.setState({ stateSearch: { autocomplete: stateSearch.dataset != 'wordlists' && stateSearch.term.length 1 } })" / English 1) ? '/autocomplete/amp?dataset=' + stateSearch.dataset + '&q=' + stateSearch.term : 'https://'" 0 && stateHdr.searchDesk ? 'pa pdd chac-sb tc-bd bw hbr-20 hbss lpt-25' : 'hdn'" {{word}} {{#beta}} Beta{{/beta}} {{#preferredDictionaries}} {{^selected}} {{name}} {{/selected}} {{/preferredDictionaries}} Words starting with i in the English Dictionary 0–9 a b c d e f g h i j k l m n o p q r s t u v w x y z Or, browse the Cambridge Dictionary index I am not my brother's keeper idiom ... I'll be bound phrase I'll be hanged if I know idiom ... IASC IATA ... ice hockey ice house ... iconicity iconoclasm ... identifiability identifiable ... idled idleness ... if you catch/get my drift phrase if you don't mind me saying/asking idiom ... ikebana ikr ... ill-tempered ill-temperedly ... illusion illusionary ... imagining imago ... immemorial immemorially ... immoralist immorality ... impact crater impact factor ... impede impeded ... impersonate impersonated ... implicit in something implicit knowledge ... importuned importuning ... impressionistic impressionistically ... impugn impugned ... in a matter of something in a mess ... in anticipation (of) phrase in any case phrase ... in company in comparison with someone/something ... in embryo phrase in escrow phrase ... in harmony in harness with idiom ... in mourning for someone in multiples of 5/100/1,000, etc. phrase ... in place of someone/something phrase in plain clothes ... in short supply phrase in shreds phrase ... in that case phrase in that event phrase ... in the face of something idiom in the fast lane idiom ... in the nick of time idiom in the not-too-distant future phrase ... in the world idiom in the wrong phrase ... in your mind's eye idiom in your old age ... in/out of print phrase in/out of the running idiom ... inappropriacy inappropriate ... incandescently incantation ... inch inch by inch idiom ... inciting incivility ... income-generating income-orientated ... inconsequent inconsequential ... incorruptibly Incoterm ... incursion incurved ... indemnity bond indemonstrable ... index-tracker indexation ... indifferent indifferently ... indiscrimination indispensability ... indoctrination indolence ... industrial agriculture industrial and organizational psychology ... industrializing industrially ... inequality inequitable ... inexpressively inextinguishable ... inference inferential ... inflamed inflaming ... influentially influenza ... information security information service ... infructuous infundibula ... inhabitancy inhabitant ... iniquity initial ... injury injury time ... innings innit ... inorganic compound inorganic growth ... inscrutably inseam ... insidious insidiously ... insouciance insouciant ... instanced instancing ... institutional advertising institutional demand ... insula insular ... insurance product insurance quote ... integument intel ... intention intention of doing something ... interannual interatomic ... intercontinental intercorporate ... interest rate interest rate arbitrage ... interfluve interfluvial ... interleave something with something interlend ... intermitotic intermittency ... international agreement international aid ... interned internee ... interparish interparochial ... interrelationship interreligious ... interstimulus interstitial ... interviewer interviewing ... intolerant of something intolerantly ... intrastate intrathecal ... intrude intrude on something ... invariable invariably ... inverted commas inverted market ... investment mix investment portfolio ... invitation invitation to bid ... inwards iodide ... Iraqi irascibility ... ironbark ironclad ... irrelevant irrelevant to someone/something ... irritability irritable ... Islamist Islamophobia ... isometrics isometry ... Isthmian games Isthmian League ... it stands to reason idiom IT strategy ... (it's) just as well (that) idiom (it's) too bad that idiom ... ITV -ity ... -ize {{#randomImageQuizHook.filename}} {{#randomImageQuizHook.isQuiz}} Test your vocabulary with our fun image quizzes Try a quiz now {{/randomImageQuizHook.isQuiz}} {{^randomImageQuizHook.isQuiz}} {{/randomImageQuizHook.isQuiz}} {{/randomImageQuizHook.filename}} Word of the Day comfort zone UK Your browser doesn't support HTML5 audio /ˈkʌm.fət ˌzəʊn/ US Your browser doesn't support HTML5 audio /ˈkʌm.fɚt ˌzoʊn/ a situation in which you feel comfortable and in which your ability and determination are not being tested About this AI Assistant Facebook Instagram X © Cambridge University Press & Assessment 2026 Learn Learn Learn New Words Help In Print Word of the Year 2021 Word of the Year 2022 Word of the Year 2023 Word of the Year 2024 Word of the Year 2025 Develop Develop Develop Dictionary API Double-Click Lookup Search Widgets License Data About About About Accessibility Cambridge English Cambridge University Press & Assessment Consent Management Cookies and Privacy Corpus Terms of Use AI Terms of Use Facebook Instagram X © Cambridge University Press & Assessment 2026 {{#displayLoginPopup}} Cambridge Dictionary +Plus Learn more with +Plus Sign up for free and get access to exclusive content: Free word lists and quizzes from Cambridge Tools to create your own word lists and quizzes Word lists shared by our community of dictionary fans Sign up now or Log in Cambridge Dictionary +Plus Learn more with +Plus Create word lists and quizzes for free Sign up now or Log in {{/displayLoginPopup}} {{#displayClassicSurvey}} {{/displayClassicSurvey}} Cambridge Dictionary +Plus My profile +Plus help Log out AI Assistant Dictionary Definitions Clear explanations of natural written and spoken English English Learner’s Dictionary Essential British English Essential American English Translations Click on the arrows to change the translation direction. 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