ながなが長々naganaga
1.

Describes an event or action that extends for a prolonged period of time, often resulting in a sense of weariness or inconvenience.

2.

Indicates a physical state of being extended over a considerable distance, often relating to lying down or stretching out.

3.

Refers to an experience or discussion that feels excessively lengthy, potentially leading to boredom or impatience.

Example:

先生は時間を守ることの大切さについて長々と述べた。