| I hope | I hope, I wish | 助 | だといいね |
| I wish | I hope, I wish | 助 | だといいね |
| idea | idea, thought, thinking | 名 | 考え |
| identical | equal, identical, equivalent | 形 | 同等の |
| idle | lazy, idle, indolent | 形 | 怠ける |
| if | if, in case of, on condition that | 接 | もし |
| if | whether, if | 接 | ～かどうか |
| ill | bad, evil, wicked, ill | 形 | 悪い |
| ill | sick, ill | 形 | 病気の |
| ill-mannered | rude, impolite, ill-mannered, uncivil | 形 | 失礼な |
| illness | sickness, illness, disease | 名 | 病気 |
| illogical | irrational, unreasonable, illogical, 他 | 形 | 不合理な |
| I'm excited | I'm exciting, I'm excited | 形 | 面白い |
| I'm exciting | I'm exciting, I'm excited | 形 | 面白い |
| image | reputation, prestige, name, image | 名 | 評判 |
| imaginary | imaginative, imaginary | 形 | 想像の |
| imaginative | imaginative, imaginary | 形 | 想像の |
| imagine | believe, feel, imagine, think | 動 | 思う |
| imagine | imagine,fancy,picture,fantasize,day.. | 動 | 想像する |
| imitate | imitate, copy, mimic, mock | 動 | 真似ぐる |
| imitation | artificial, fake, imitation, false | 形 | 人工の |
|---|
| immature | childish, childlike, immature | 形 | 幼い |
| immediate | urgent, immediate, pressing, prompt | 形 | 早急の |
| immediately | soon, immediately, at once 他 | 副 | すぐに |
| immediately | shortly, promptly, immediately, instantly | 副 | すぐに |
| immense | huge, enormous, immense | 形 | 巨大な |
| immigrate | migrate, emigrate, immigrate | 動 | 移住する |
| implement | instrument,appliance,apparatus,implement,tool | 名 | 器具 |
| imply | hint, imply, insinuate, suggest | 動 | ほのめかす |
| imply | mean, imply, indicate | 動 | 意味する |
| impolite | rude, impolite, ill-mannered, uncivil | 形 | 失礼な |
| improve | change, improve, revise | 動 | 改める |
| improve | enhance, make better, improve | 動 | 良くする |
| improve | invent, develop, improve | 動 | 発明する |
| impudent | impudent, cheeky, shameless, forward | 形 | 無神経な |
| in | after, later, in | 副 | あとで |
| in | after, later, in | 前 | あとで |
| in a long time | for a long time, in a long time | 副 | 長い間 |
| in advance | before, earlier, previously, prior.. 他 | 副 | 前に |
| In case of | In case of, In the case of | 接 | ～の場合 |
| in case of | if, in case of, on condition that | 接 | もし |
| inadequate | not enough, insufficient, inadequate | 形 | 不十分な |
| incentive | incentive, motive | 名 | 動機 |
| incident | event, accident, incident | 名 | 出来事 |
| inclination | trend, tendency, inclination | 名 | 傾向 |
| include | contain, include | 動 | 含む |
| incorrect | false, incorrect, wrong | 形 | 間違った |
| increase | increase, multiply, rise | 動 | 増える |
| indicate | demonstrate, indicate, reveal, show | 動 | 示す |
| indicate | mean, imply, indicate | 動 | 意味する |
| indispensable | necessary, essential, indispensable | 形 | 必要な |
| indolent | lazy, idle, indolent | 形 | 怠ける |
| indulge | indulge, humor, pamper, spoil | 動 | 甘やかす |
|---|
| industrial | industrial, industrious | 形 | 工業の |
| industrious | industrial, industrious | 形 | 工業の |
| inexpensive | cheap, inexpensive | 形 | 安い |
| influence | affect, influence | 動 | 影響を与える |
| inform | inform, let (a person) know, tell/notify | 動 | 知らせる |
| information | information, data | 名 | 情報 |
| infrequent | rare, infrequent, uncommon, unusual | 形 | 珍しい |
| in fashion | in fashion, fashionable, popular, prevalent | 形 | 流行ってる |
| in front of | before, in front of | 前 | ～の前 |
| in future | in the future, in future, from now | 副 | 将来は |
| ingenuous | innocent, ingenuous, naive | 名 | 無邪気な |
| injure | damage, harm, hurt, injure | 動 | 傷つける |
| injure | injure, hurt, wound | 動 | 傷つける |
| injury | injury, wound | 名 | 傷 |
| inn | hotel, inn | 名 | ホテル |
| innocent | innocent, ingenuous, naive | 名 | 無邪気な |
| innovate | innovate, change | 動 | 変える |
| in particular | specifically, in particular, notably | 副 | 特に |
| inquiry | examination, inquiry, inspection | 名 | 検査 |
| insect | insect, bug, worm, moth | 名 | 虫 |
| in short | in short, anyway | 副 | とにかく |
| insinuate | hint, imply, insinuate, suggest | 動 | ほのめかす |
| insist | assert, claim, maintain, insist | 動 | 主張する |
| insist | insist, persist | 動 | 主張する |
| insolent | proud,arrogant,haughty,insolent,conceited | 形 | 高慢な |
| inspect | check, examine, inspect | 動 | 調べる |
| inspection | examination, inquiry, inspection | 名 | 検査 |
| inspire | excite, inspire | 動 | 刺激する |
| in spite of | despite, in spite of | 前 | にもかかわらず |
| instantly | shortly, promptly, immediately, instantly | 副 | すぐに |
| institute | institute, institution | 名 | 組織 |
| institution | institute, institution | 名 | 組織 |
| instructor | teacher, tutor, instructor, coach, trainer | 名 | 先生 |
| instrument | instrument, tool, kit | 名 | 道具 |
| instrument | instrument,appliance,apparatus,implement,tool | 名 | 器具 |
| insufficient | not enough, insufficient, inadequate | 形 | 不十分な |
| insure | assure, guarantee, insure | 動 | 保証する |
| intelligent | clever, intelligent, wise | 形 | かしこい |
| intend to | be going to, intend to, mean to, plan to | 動 | するつもり |
| intense | strong, powerful, intense | 形 | 強い |
| intentionally | consciously,deliberately,intentionally,knowingly,. | 副 | 故意に |
| interest | hobby, pastime, interest | 名 | 趣味 |
| interesting | interesting, exciting, amusing | 形 | おもしろい |
| interesting | interesting, funny | 形 | 面白い |
| interpret | interpret, translate | 動 | 通訳する |
| interrupt | prevent, block, interrupt | 動 | 妨げる |
| In the case of | In case of, In the case of | 接 | ～の場合 |
| in the course of | during, over, within, all through,.. | 前 | ～の間 |
| in the future | in the future, in future, from now | 副 | 将来は |
| intimate | friendly, intimate, close | 形 | 親しい |
| intimidate | frighten, intimidate, scare, terrify | 動 | 怖がらせる |
| invaluable | valuable, precious, invaluable | 形 | 貴重な |
| invent | invent, develop, improve | 動 | 発明する |
| invest | save, deposit, invest | 動 | 蓄える |
| investigation | investigation, survey, research | 名 | 調査 |
| involved | complex, complicated, involved | 名 | 複雑な |
| irony | irony, sarcasm, satire | 名 | 皮肉 |
| irrational | irrational, unreasonable, illogical, 他 | 形 | 不合理な |
| irresponsible | irresponsible, unreliable, halfhearted, sloppy | 形 | いい加減な |
| irritated | nervous, irritated | 形 | 神経質な |
| issue | issue, matter, problem, question | 名 | 問題 |
| it | 代名詞 it と that の違いと使い分け | 代 | それ |
| it depends | depend on, it depends, up to | 動 | 〜による |
| its | its, it's | 代 | その |
| it's | its, it's | 代 | その |
| It's because | It's because, That's why | 名 | だから～ |