ぐうぜん偶然guuzen
1.

The occurrence of events or situations that take place unexpectedly, without any apparent cause or intention, often leading to surprising outcomes.

2.

An incident or moment where something unpredictable happens, typically leading to a chance encounter or an unforeseen result.

3.

A situation in which events align by chance rather than through deliberate planning or necessity, giving rise to coincidences or unexpected alignments.

4.

The nature of happenings that are accidental or fortuitous, lacking a direct connection or predictable causality.

5.

Describing moments or events that arise randomly or by chance, often leading to serendipitous discoveries or encounters.

Example:

私は、偶然旧友に会った。

ぐうぜん偶然guuzennoいっち一致itchi
1.

A situation in which two or more events occur at the same time by chance, often leading to a surprising or unexpected connection between them.

2.

An unexpected alignment of circumstances or events that seems to have significance, despite being purely coincidental.

3.

The occurrence of two or more seemingly unrelated incidents happening simultaneously, resulting in an impression of connection or synchronicity.