| Kanji 漢字 / Romaji 音韻 | Kana / Hiragana / Phonetic | Definition |
| レイリー数 | れいりーすう | Rayleigh number (10) |
| reiri^ kazu | reiri ^ suu |
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| レイリア | (p) Leiria (Portugal) |
| reiria |
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| レイリー | (u) Reilly |
| reiri^ |
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| 零露 | れいろ | (n) dripping dew |
| rei tsuyu | reiro |
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| 玲瓏 | れいろう | clear / brilliant |
| reirou | reirou |
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| 玲瓏たる | れいろうたる | (adj-t) translucent / brilliant / sweetly ringing (as tinklings of jades) / clear |
| reirou taru | reiroutaru |
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| 冷涼 | れいりょう | (n) coolness |
| reiryou | reiryou |
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| 例祭 | れいさい | (n) regular festival / annual festival |
| rei matsuri | reisai |
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| 零砕 | れいさい | (rare) a tiny bit |
| rei sai | reisai |
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| 零細 | れいさい | insignificant / trifling / paltry |
| reisai | reisai |
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| 零細企業 | れいさいきぎょう | small business |
| reisaikigyou | reisaikigyou |
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| 零細農 | れいさいのう | (n) subsistence farming |
| reisai nou | reisainou |
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| レイサム | (u) Latham |
| reisamu |
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| 令婿 | れいせい | (n) your son-in-law |
| rei muko | reisei |
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| 霊性 | れいせい | divine nature / spirituality |
| rei sei | reisei |
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| 冷静 | れいせい | calm / composure / coolness / serenity |
| reisei | reisei |
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| 励精 | れいせい | (n) diligence |
| rei sei | reisei |
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| 励声 | れいせい | (n) shouts of encouragement |
| rei koe | reisei |
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| レイセク | (u) Lejsek |
| reiseku |
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| 霊泉 | れいせん | (n) miraculous spring or fountain |
| rei izumi | reisen |
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| 冷戦 | れいせん | (n) cold war |
| reisen | reisen |
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| 冷泉 | れいせん | (n) cold mineral spring |
| rei izumi | reisen |
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| 冷戦型思考 | れいせんがたしこう | Cold War mentality |
| reisen kata shikou | reisengatashikou |
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| レイセルベルヘ | (u) Rysselberghe |
| reiseruberuhe |
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| 礼節 | れいせつ | (n) decorum / propriety / politeness |
| reisetsu | reisetsu |
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| 冷接点 | れいせってん | cold junction (13) |
| rei setten | reisetten |
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| レイシャリズム | racialism |
| reisharizumu |
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| れいし | bitter gourd |
| reishi |
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| 令嗣 | れいし | (n) your (his) heir |
| rei tsugu | reishi |
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| 令姉 | れいし | (n) your elder sister |
| rei ane | reishi |
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| 令旨 | れいし | (n) prince's message / command of a prince |
| rei mune | reishi |
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| 霊芝 | れいし | (n) Fomes japonicus |
| rei shiba | reishi |
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| 麗姿 | れいし | (n) beautiful figure |
| rei sugata | reishi |
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| 茘枝 | れいし | (n) lychee (litchi) nut |
| rei eda | reishi |
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| レイシイ | (u) Lacy |
| reishii |
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| 例式 | れいしき | (n) regular ceremony / established form |
| rei shiki | reishiki |
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| 礼式 | れいしき | (n) etiquette / manners |
| reishiki | reishiki |
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| 励振 | れいしん | excitation (13) |
| reishin | reishin |
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| 励振 | れいしん | (n) excitation (drive) |
| reishin | reishin |
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| 励振管 | れいしんかん | exciter tube |
| reishin kan | reishinkan |
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