long time; several hours; long spell
Used as a noun or adverb to describe a duration that feels long, often in contexts like work, travel, or waiting. Can be modified by の to act as a no-adjective.
I got tired from the long flight.
彼は長時間働き続けた。
He kept working for a long time.
If you stand for a long time, your lower back starts to hurt.
The lengthy meeting finally came to an end.
The long flight left me a bit exhausted.
I spent a long time finishing the report.