同意（どうい、doui）
- approval

The Japanese word 同意 means "agreement," "consent," or "assent." It signifies that one person or entity shares the same opinion, viewpoint, or approval as another. It can apply to various contexts, from agreeing with someone's idea to giving consent to a request or action. The concept of 同意 centers around a state of alignment or endorsement.

⚫︎私はその意見に同意］します。 Translation: I agree with that opinion. ⚫︎彼は提案に同意］しました。 Translation: He agreed to the proposal. ⚫︎親は子供の旅行に同意］しました。 Translation: The parents consented to their child's trip.

⚫︎同意 is a versatile word suitable for various situations. ⚫︎It's used when you want to express your agreement with someone's statement, opinion, or suggestion. ⚫︎It can also be used to indicate your consent to a plan, request, or action. ⚫︎The level of formality can change depending on the context and the people involved. ⚫︎When speaking to someone senior or in a formal setting, you might use the more polite form. For example, 同意いたします (I agree).

⚫︎The word is typically written with the kanji 同意. ⚫︎The reading is どうい (dōi) in hiragana. ⚫︎There is no common use in katakana. ⚫︎The okurigana (the suffix hiragana) is standard and does not have variations.

⚫︎賛成 (さんせい - sansē): Agreement, approval. ⚫︎承認 (しょうにん - shōnin): Approval, recognition, consent. ⚫︎承諾 (しょうだく - shōdaku): Acceptance, consent. ⚫︎承知 (しょうち - shōchi): Understanding, agreement (often used in business settings).

⚫︎反対 (はんたい - hantai): Opposition, disagreement. ⚫︎拒否 (きょひ - kyohi): Refusal, rejection. ⚫︎不同意 (ふどうい - fudōi): Disagreement, dissent.

私は彼の計画に同意］しました。 ・Translation: I agreed to his plan. ・Explanation: This sentence illustrates a simple case of giving 同意 to someone's proposal.

会議で全員がその新しい方針に同意］しました。 ・Translation: Everyone at the meeting agreed to the new policy. ・Explanation: This sentence demonstrates 同意 in a group setting where consensus was reached.

The word 同意 is a compound word formed from two kanji: 同 (dō), meaning "same," and 意 (i), meaning "thought," "opinion," or "mind." Therefore, 同意 literally means "same opinion" or "same thought," reflecting the core meaning of agreement.