| 成句・複合語： |
| a novice at | n | (a beginner in or at an activity) | ～の素人 名 |
| aim at | | 銃などで | ～を狙う |
| | 目標など | ～を目指す、目的とする |
| all at once | | | いっせいに、いっぺんに 副 |
| | | 突然、急に、だしぬけに 副 |
| ambassador-at-large | n | (special diplomatic envoy) | 特使 名 |
| an old hand at | n | informal (experienced in: an activity) | ～のベテラン 名 |
| arrive at | | | ～に着く、到着する 自動 |
| as at | prep | (as it stands on: a given date) | ～時点で |
| asleep at the switch | adj | colloquial, US (negligent, failing to pay attention) | うっかりと任務を怠って |
| at a disadvantage | adv | (in an inferior position) | 不利な立場で 副 |
| at a discount | | | 割引価格で、割引で、安価に |
| at a distance | adv | (comfortably far away) | 少し離れて、離れたところで 副 |
| at a distance | adv | literal (some distance removed) | 隔てて、ある距離を置いて 副 |
| at a glance | adv | literal (with one quick look) | 一見して、一目で 副 |
| at a glance | adv | figurative (quickly, rapidly) | 即座に、一瞬に 副 |
| at a good price | adv | (at a fair or reasonable cost) | 道理にかなった値段で 副 |
| at a later time | | | 後で、しばらく経って |
| at a loss | adv | (incurring a financial loss) 金銭的 | 損をして 副 |
| at a loss | adj | (unable to understand sth) | 困った、途方に暮れた 形 |
| at a premium | adv | (scarce, sought-after) 価格 | プレミアム付きで、異様に高く 副 |
| at a profit | | | 利益を上げて、もうけて |
| at a slow pace | adv | (slowly) | ゆっくりとしたペースで 副 |
| at a standstill | adj | literal (traffic: not moving forward) 交通 | 止まって 副 |
| at a standstill | adj | figurative (not progressing) | 行き詰って 副 |
| at a stretch | adv | (in one go, in one session) | 立て続けに、一気に 副 |
| at about | adv | (time: at approximately) 時間 | ～時ごろ |
| at all | | | 全く～ない、全然～ない |
| Note: 否定文で使用され、「全く～ない、全然～ない」という意味になる。 |
| at all costs | adv | (whatever the cost may be) | ぜひとも、どんなことをしても、いかなる犠牲を払っても 副 |
| at all times | adv | (all the time, constantly) | いつも 副 |
| at an angle | adv | (diagonally, obliquely) | 斜めに 副 |
| at an early hour | adv | (early in the morning) | 早朝に、朝早くに 副 |
| at an end | adj | (finished, over) | 終わって 形 |
| at an impasse | adj | figurative (at a standstill, at a dead end) | 行き詰って 形 |
| at another time | adv | (at some point in the future) 未来 | 別のときに、別の折に 副 |
| at another time | adv | (at some point in the past) 過去 | 別のときに 副 |
| at any age | adv | (no matter what one's age) | 年齢に関係なく、どの年代でも 副 |
| at any cost | adv | (however high the cost may be) | いかなる代償を払っても、何が何でも、なんとしても、絶対に 副 |
| at any price | | | 何が何でも、何としても、どんな犠牲を払っても、絶対に |
| | | 金がいくらかかっても、どんな値段でも |
| at any rate | adv | (anyway, in any case) | とにかく、いずれにせよ 副 |
| at any time | adv | (whenever convenient) | いかなる時でも、いつでも、どんな時でも 副 |
| at any time | adv | (without warning) | いつ何時 副 |
| at arm's length | adv | figurative (at a safe distance) | 十分離れて 副 |
| at arm's length | adv | literal (at the end of one's extended arm) | 腕を伸ばした位置に 副 |
| at attention | adv | (military: standing straight) 軍事 | 気をつけの姿勢で 副 |
| at auction | adv | (in a public bidding sale) | オークションで［に］、競売で［に］ 副 |
| at bay | adv | (under control) | 追い詰めて、逃げられないようにして 副 |
| at best | adv | (no greater or better than) | よくても、せいぜい 副 |
| | 人 | 最高の状態で、絶好調で 副 |
| at breakneck speed | adv | (dangerously fast) | 猛スピードで 副 |
| at close quarters | adv | (close together, close by) | 間近で 副 |
| at cross-purposes | adv | (in a misunderstanding) | 誤解して 副 |
| at cross-purposes | adj | (at odds, not in agreement) | 意見が食い違って、ちぐはぐで 形 |
| at dawn | adv | (early in the morning; daybreak) | 夜明けに、明け方に 副 |
| at death's door | adv | (very ill, about to die) | 死にかけで、瀕死で 副 |
| at discount prices | adv | (cheaply, at lower cost than usual) | 割引で、安く 副 |
| at dusk | adv | (when night falls, at twilight) | 夕暮れに、日暮れに 副 |
| at each other's throats | adj | (arguing, fighting) | いがみあって、激しく言い争って 形 |
| at ease | | | 安心して、気楽で、のんびりして、くつろいで |
| at ease with | | | ～と一緒にいると気楽である |
| at every turn | adv | (constantly, repeatedly) | いたるところで 副 |
| at fault | adj | (responsible, to blame) | 責任のある 形 |
| at first | | | 初めは、最初は |
| at first blush | adv | (at first impression) | 一見して、一目見て 副 |
| at first glance | adv | (initially) | 一見して、一目見ただけで 副 |
| at first sight | adv | (instantly, immediately) | 直ちに、すぐに 副 |
| at full blast | adv | (at the loudest volume possible) | 大音量で 副 |
| at full blast | adv | (as forcefully as possible) | 全力で、全速力で、フル回転で 副 |
| at full gallop | adv | (as fast as possible) | 全速力で 副 |
| at full speed | adv | (as fast as possible) | 全速力で 副 |
| at full throttle | adv | literal (vehicle: at top speed) 車 | 全速力で、フルスピードで 副 |
| at full throttle | adv | figurative (person: as fast as possible) 人 | 全速力で 副 |
| at grade | exp | idiom (on the same level) | 同一レベルで、同一平面で 副 |
| at great cost | adv | literal (at great financial expense) | 莫大な費用を払って 副 |
| at great cost | adv | figurative (involving great sacrifice or loss) | 多大な犠牲を払って 副 |
| at great expense | adv | (at great financial cost) | 莫大な費用で 副 |
| at gunpoint | adv | (at the point of a gun) | 銃を突きつけられて［突きつけて］ 副 |
| at gunpoint | adv | figurative (under threat) | 銃で脅されて［脅して］ 副 |
| at hand | | | 手元に、手近に |
| | | 接近して、間近に |
| at heart | adv | (deep down, by one's true nature) | 内心は、本心では、本当は 副 |
| at home | adj | (comfortable, at ease) | くつろいで、気楽で、リラックスして 副 |
| at home | adv | literal (in one's own house) | 家で、自宅で、在宅で 副 |
| at home | n | (social reception at one's home) | 家庭での社交的な集まり 名 |
| at home with | adv | (comfortable or familiar with) | ～と親しい間柄である |
| | | ～に精通している |
| at issue | | | 論争中で、未解決で |
| | | 問題の、問題になっている、論争中の |
| at it | adj | slang (having sex) 性的・俗語 | やっている、セックスしている |
| at large | adj | (escaped, on the loose) | 逃亡中で、捕まらないで |
| at large | adj | (in general, as a whole) | 概して、広く、全体として |
| at large | adj | (position, role: free-ranging) | 自由で 形 |
| at last | | | ついに、とうとう、やっと 副 |
| at least | | | 少なくとも、最低でも |
| | | ともかく、いずれにせよ |
| at leisure | adv | (when it is convenient) | 都合の良い時に、暇な時に 副 |
| at leisure | adj | (free of planned activities) | 余暇に 副 |
| at length | | 説明など | 長々と、長時間に渡って、詳細に |
| | | ようやく、ついに |
| at liberty | adj | (free) | 自由で、暇で 形 |
| at liberty | adj | (unconstrained) | 解放されて 形 |
| at loggerheads | adj | (in opposition, in a dispute) | 不和で、けんかして、仲たがいして 形 |
| at maturity | adv | (debt: when payment is due) 負債など | 支払期日に、満期日に 副 |
| at maturity | adv | (investment: when payable to owner) 投資 | 満期時に 副 |
| at midday | adv | (at 12 o'clock pm) | 正午に 副 |
| at most | | | せいぜい、たかだか、多くて、最大限でも |
| at night | adv | (during the nighttime) | 夜に、夜中に、夜間に 副 |
| at no time | | | 決して～しない |
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