kiめるmerukiめるmeru
1.

To select a specific option from among various possibilities concerning a matter, and to proceed based on that choice.

2.

To establish rules or guidelines, thereby creating a course of action that will not change.

3.

To clarify one's own intentions or stance, resulting in a firm decision about a future action.

4.

To ensure a specific outcome or result remains unchanged or stable after reaching a conclusion.

5.

To appropriately dress or present oneself in a manner suitable for a particular occasion, enhancing one's appearance.

6.

To execute a particular technique or move effectively, ensuring it achieves the desired result.

Example:

そこに行くことに決めた。

torikiめるmeru
1.

To come to a mutual agreement through discussion, establishing terms or conditions between parties.

2.

To make a definitive choice or decision about a particular matter after careful consideration or negotiation.

3.

To formally establish an arrangement or commitment, often involving an understanding or contract between individuals or organizations.

Example:

その2国は平和条約を取り決めた。