やくそく約束yakusoku
1.

A mutual agreement between parties regarding a future event or obligation, often implying a commitment that must be honored.

2.

An established rule or custom within a social group or organization that members are expected to adhere to, functioning as a guideline for behavior.

3.

A predetermined fate or destiny that is believed to have been set before birth, often linked to concepts of karmic ties or past lives.

4.

A commitment to follow through on a planned course of action, often highlighted by the necessity of compliance once the agreement has been made.

Example:

自分が約束したことはちゃんと実行するように最善を尽くすべきだ。

けいやく契約keiyaku
1.

A formal and legally binding arrangement established between two or more parties that creates mutual obligations, typically involving the exchange of goods, services, or promises.

2.

A commitment made between individuals or entities where specific terms are agreed upon, often documented to ensure clarity and enforceability.

3.

In a religious context, a sacred agreement or covenant between a deity and humanity, signifying obligations and divine promises as seen in the traditions of Judaism and Christianity.

4.

The act of engaging in a mutual promise, which may vary in formality and intent, encompassing any informal or formal agreement between parties.

Example:

契約はかなりいいかげんなものだった。

こんやく婚約kon'yaku
1.

A formal agreement between two individuals to marry in the near future, indicating a commitment to a shared life together.

2.

The state of being pledged to marry someone, often accompanied by rituals or tokens, such as an engagement ring, symbolizing the seriousness of the commitment.

3.

The process or act of establishing a commitment to marriage, which may involve discussions of future plans and expectations between the parties involved.

Example:

とうとう私の姉は婚約した。

やくyaku
1.

A term indicating a rough estimate or approximation related to quantity or time, often used to convey the idea of "about" or "around."

2.

A concept referring to a promise or agreement, typically in a formal or traditional context, emphasizing commitment or solemnity in relationships.

3.

A notion of summarization or simplification, where information or content is condensed for brevity or clarity.

Example:

その値段は約50ドルだった。

よやく予約yoyaku
1.

The act of arranging for a service, seat, or item in advance, ensuring permission to use or access it at a later time through a formal commitment.

2.

A formal agreement made beforehand to secure a specific service or product, often involving a financial deposit or a contractual obligation for future use.

3.

The process through which one communicates a need to schedule or secure a particular slot or item, thereby making the necessary arrangements to guarantee availability.

Example:

「ホテルの予約はしてありますか」「すみませんが、まだなんです」