| Subject | English | Japanese |
| gen. | n yoji a strong beginning and a weak ending | 竜頭蛇尾 |
| gen. | n to aim at a weak point | 付け目 |
| gen. | become weak | 衰える ichi1 news2 nf26 |
| gen. | become weak | 力が抜ける |
| gen. | become weak | 薄まる ichi1 news2 nf36 |
| gen. | become weak | 萎える |
| obs. | being alone and weak with no place to go to | 孤弱 |
| gen. | n chivalrous man who helps the weak and fights the strong | 男達 |
| gen. | n chivalrous man who helps the weak and fights the strong | 男伊達 |
| law | constitutionally weak person | 身体虚弱者 |
| el., sec.sys. | echo function with weak infeed end | 弱電源端打返し機能 |
| gen. | exp even the weakest and smallest beings have their own wills, so do not make light of them | 一寸の虫にも五分の魂 |
| supercond. | grain boundary weak link | 粒界弱結合 |
| gen. | grow weak | 力が抜ける |
| gen. | exp having a weak chest | 肺が弱い |
| sumo. | having weak defenses | 脇が甘い |
| sumo. | having weak defenses | わきが甘い |
| gen. | adj-na n having weak legs | 足弱 |
| gen. | adj-na n adj-no helping the weak and fighting the strong | 仁侠 |
| gen. | adj-na n adj-no helping the weak and fighting the strong | 任侠 news2 nf33 |
| gen. | exp obsc it is easy to have one's weak points taken advantage of | 秋の鹿は笛に寄る |
| gen. | n microbially fermented weak adhesive for restoration of Japanese works of art on paper | 古糊 |
| gen. | adj-no adj-na n on the weak side | 薄目 ateji |
| gen. | adj-no adj-na n on the weak side | 薄め |
| gen. | exp yoji one strong, many weak | 一強他弱 |
| gen. | exp yoji one strong, many weak | 一強多弱 |
| gen. | physically weak | 堕弱 oK |
| gen. | physically weak | 懦弱 |
| gen. | physically weak | 惰弱 |
| gen. | n physically weak or sickly child | 虚弱児 |
| gen. | sens preliminary test to eliminate weak contenders | 足切り (あしきり) |
| gen. | n society in which individuals are isolated and have weak personal links between each other | 無縁社会 |
| gen. | adj-i somewhat weak in the head | 少々足りない |
| gen. | adj-i somewhat weak in the head | 少少足りない |
| gen. | n strong and weak points | 得手不得手 |
| gen. | strong and weak points | 長短 news1 nf08 |
| gen. | adj-na n stupid and weak | 愚弱 |
| gen. | n the weak | 弱者 news1 nf12 |
| gen. | n the weak | 弱い者 |
| gen. | n the weak | 弱き者 news2 nf45 |
| gen. | n the weak | 弱 ichi1 |
| gen. | n yoji the weak are meat the strong do eat | 弱肉強食 news2 nf42 |
| gen. | n the weak of society | 社会的弱者 |
| gen. | thin or weak | ぺらぺら ichi1 (paper, cloth) |
| gen. | thin or weak | ペラペラ (paper, cloth) |
| gen. | exp though the woman is weak, the mother is strong | 女は弱し然れど母は強し |
| gen. | exp though the woman is weak, the mother is strong | 女は弱しされど母は強し |
| gen. | exp v5r to be weak in the knees | 腰がぬける |
| gen. | exp v5r to be weak in the knees | 腰が抜ける |
| gen. | weak acid | 弱酸性 (じゃくさんせい) |
| gen. | n weak acid | 弱塩酸 |
| gen. | n weak acid | 弱酸 (jakusan) |
| gen. | weak-acidic | 弱酸性 (じゃくさんせい) |
| tech. | weak acidic ion-exchange resin | 弱酸性交換樹脂 (じゃくさんせいイオンこうかんじゅし) |
| tech. | weak acidity | 弱酸性 (じゃくさんせい) |
| gen. | weak alkaline | 弱アルカリ性 |
| gen. | adj-na weak and soft | なよやか lit. |
| gen. | n weak argument | 軟論 |
| gen. | weak assertive predicate | 弱断定的述語 |
| gen. | adj-na n adj-no weak attitude | 弱腰 news2 nf26 spec2 |
| construct. | weak axis | 弱軸 (ぢゃく・ぢく) |
| chem. | n weak base | 弱塩基 (jakuenki) |
| tech. | weak base ion-exchange resin | 弱塩基性交換樹脂 (じゃくえんきせいイオンこうかんじゅし) |
| gen. | weak-basic | 弱塩基性 |
| gen. | adj-na vs on-mim weak-bodied | へらへら sometimes 〜な |
| gen. | n weak boson | ウイークボソン |
| gen. | n weak boson | ウイーク・ボソン |
| gen. | n weak boson | ウィーク・ボソン |
| gen. | n weak boson | ウィークボソン |
| gen. | n weak child | 萌やしっ子 |
| gen. | n weak child | もやしっ子 |
| tech. | weak children's facilities | 養護施設 (ようごしせつ) |
| gen. | n weak coffee | アメリカン・コーヒー |
| gen. | n weak coffee | アメリカンコーヒー |
| gen. | n adj-no weak constitution | 病身 news2 nf41 |
| gen. | n weak constitution | 虚弱体質 |
| gen. | adj-na n adj-no weak constitution | 病弱 ichi1 news1 nf24 |
| phys. | weak convergence | 弱収束 (jakushūsoku) |
| gen. | n weak country | 弱国 |
| phys. | n weak coupling | 弱結合 |
| gen. | n adj-no weak digestion | 胃弱 |
| phys. | weak dimension | 弱次元 (ぢゃくぢげん) |
| tech. | weak earthquake | 軽震 (けいしん) |
| gen. | n weak earthquake | 軽震 news1 nf22 (けいしん) |
| gen. | Weak earthquake region | 弱震 (じゃくしん) |
| gen. | n weak economy | 弱い経済 |
| gen. | n weak electric current | 弱電 |
| phys. | weak electric field | 弱電界 (ぢゃくでんかい) |
| gen. | n weak electrical current line | 弱電線 (e.g. intercom) |
| gen. | weak electrolyte | 弱電解質 (ぢゃく・でんかいしつ) |
| gen. | n weak ending | 尻窄み |
| gen. | n weak ending | 尻つぼみ |
| gen. | n weak ending | 尻すぼみ |
| gen. | n weak enemy | 少敵 |
| gen. | n weak enemy | 小敵 |
| gen. | n weak enemy | 弱敵 |
| phys. | weak ferromagnetism | 弱強磁性 (ぢゃく・きょうぢせい) |
| el.tract. | weak field | 弱め界磁 |
| gen. | n weak flour | 箔力粉 ik |
| gen. | n weak flour | 薄力粉 news2 nf27 |
| phys. | weak focusing | 弱集束 (ぢゃくしゅうそく) |
| gen. | n yoji weak foreign policy | 弱腰外交 |
| gen. | n yoji weak foreign policy | 軟弱外交 |
| gen. | weak form | 弱形式 |
| gen. | weak from old age | よぼよぼ |
| gen. | weak gleyzation | 弱グライ化作用 |
| gen. | exp adj-i weak-headed | 酒に弱い |
| gen. | adj-i weak-headed | 頭の悪い |
| gen. | exp adj-i weak-headed | 頭がわるい |
| gen. | exp adj-i weak-headed | 頭が悪い |
| gen. | n yoji weak-hearted approach | 軟弱路線 |
| phys. | weak interaction | 弱い相互作用 (よわい・そうご・さよう) |
| phys. | exp n weak interaction | 弱い相互作用 (よわい・そうご・さよう) |
| gen. | weak jump | 弱跳水 |
| gen. | weak-kneed | 屁っぴり腰 |
| gen. | adj-na adj-no n weak-kneed | 弱気 ichi1 news1 nf17 (よわき) |
| gen. | weak-kneed | へっぴり腰 |
| gen. | weak-kneed | 屁っ放り腰 |
| gen. | adj-i weak-kneed | 意気地のない |
| gen. | n yoji weak-kneed diplomacy | 弱腰外交 |
| gen. | n yoji weak-kneed diplomacy | 軟弱外交 |
| med. | n weak labor | 微弱陣痛 |
| med. | n weak labour | 微弱陣痛 |
| IMF. | weak law of large numbers | 大数の弱法則 |
| gen. | weak-looking fellow | 末成り |
| gen. | weak-looking fellow | 末成 io |
| gen. | n weak-looking fellow | 末生 |
| gen. | weak-looking fellow | 末生り |
| phys. | weak magnetic field | 弱磁界 (ぢゃくぢかい) |
| gen. | n yoji weak bear(ish) market | 弱気相場 (よわきそうば) |
| gen. | n weak matcha | お薄 |
| gen. | n weak matcha | 御薄 |
| gen. | n adj-no weak matcha | 薄茶 |
| gen. | adj-i weak-minded | 腑甲斐ない |
| gen. | adj-i weak-minded | 腑甲斐無い |
| gen. | adj-i weak-minded | 不甲斐無い |
| gen. | adj-i weak-minded | 不甲斐ない |
| abbr. | n weak-minded child | 精薄児 |
| gen. | n weak-minded child | 精神薄弱児 |
| phys. | weak minimum | 弱極小 (ぢゃくきょくしょう) |
| ling. | n obsc weak negation | 準否定 |
| gen. | n weak opponent | 小敵 |
| gen. | n weak opponent | 少敵 |
| gen. | n weak person | 弱き者 news2 nf45 |
| gen. | n weak person | 弱者 news1 nf12 |
| pejor. | weak person | 味噌 ichi1 news2 nf32 (miso) |
| gen. | n weak person | 弱い者 |
| comp., MS | weak PIN | 脆弱な PIN (Any PIN that could be easily guessed by a hacker) |
| gen. | n weak point | 欠点 ichi1 news1 nf12 (けってん) |
| gen. | n weak point | 弱点 ichi1 news1 nf11 (じゃくてん) |
| gen. | adj-na n one's weak point | 不得意 ichi1 news2 nf35 |
| gen. | adj-na n weak point | 不得手 news2 nf43 |
| gen. | adj-na n weak point | 不能 ichi1 news1 nf14 (ふの) |
| gen. | opponent's weak point | 搦め手 |
| gen. | opponent's weak point | 搦手 io |
| gen. | weak point | 傷 ichi1 news1 nf05 (kizu) |
| gen. | weak point | 瑕 (きず) |
| gen. | weak point | 創 |
| gen. | n weak point | 短 |
| gen. | weak point | 苦手 |
| gen. | n weak point | やだ |
| gen. | weak point | 疵 (きず) |
| gen. | n one's weak point | 弁慶の泣き所 |
| gen. | n weak point | 短所 ichi1 news2 nf27 (たんしょ) |
| gen. | n weak point | ウイーク・ポイント |
| gen. | n weak point | ウイークポイント gai2 |
| gen. | n weak point | ウィーク・ポイント |
| gen. | n one's weak point | 引け目 ichi1 news2 nf47 |
| gen. | n one's weak point | ひけ目 |
| gen. | n weak point | 泣き所 news2 nf44 |
| gen. | n weak point | 泣きどころ |
| gen. | n weak point | 泣き処 |
| gen. | n weak point | ウィークポイント |
| gen. | n weak poison | 弱毒 |
| IMF. | weak policies scenario | 弱い政策対応シナリオ |
| gen. | weak pulse | 虚脈 |
| gen. | n weak rain | 弱雨 |
| obs. | n weak sake | 醪 |
| obs. | n weak sake | 醨 |
| gen. | n adj-no weak sight | 弱視 news2 nf37 |
| gen. | n weak signals | 微弱電波 |
| tech. | weak solution | 弱解 (じゃくかい) |
| gen. | n weak stomach | お腹ピーピー |
| tech. | weak stratum | 軟弱層 (なんじゃくそう) |
| gen. | n weak tengu | 木端天狗 (goblin) |
| gen. | n weak tengu | 木の葉天狗 (goblin) |
| phys. | weak topology | 弱位相 (ぢゃくいそう) |
| phys. | weak turbulence | 弱い乱れ (よわい・みだれ) |
| gen. | n weak verb | 弱変化動詞 |
| gen. | n weak will | 弱志 |
| gen. | adj-na n weak-willed | 堕弱 oK |
| gen. | n weak-willed | 薄志 |
| gen. | adj-na n weak-willed | 惰弱 |
| gen. | adj-na n weak-willed | 懦弱 |
| gen. | adj-na n adj-no yoji weak-willed | 意志薄弱 |
| tech. | weakest-link | 最弱結合 (さいじゃくけつごう) |
| gen. | weakest link model | 最弱リンクモデル |
| gen. | weakest link theory | 最弱リンク説 |
| gen. | exp willows are weak, yet they bind other wood | 柔能く剛を制す |
| gen. | exp willows are weak, yet they bind other wood | 柔よく剛を制す |
| gen. | exp you have to be careful not to expose your weak point while attempting to protect yourself | 頭隠して尻隠さず |
| gen. | adj-na n young and weak | 幼弱 |