kiまぐれmagure
1.

A tendency to change one’s mind or behavior unpredictably, often influenced by fleeting emotions or desires, resulting in actions that appear spontaneous or arbitrary.

2.

Describes a state or attitude characterized by inconsistent preferences or moods, leading to sudden shifts in one's decisions or feelings without clear reason.

3.

The quality of being unreliable in one's intentions or commitments, reflecting a playful yet capricious disposition that may amuse or frustrate others.

4.

An inclination towards whimsical and spontaneous choices, often lacking a fixed or logical basis, showcasing a lighthearted approach to life’s decisions.

Example:

私たちがポルトガルへ行こうと決めたのはまったくの気まぐれだった。