Tedious (adjective)

1. Extremely boring and therefore difficult to tolerate over an extended period of time.
2. Taking a long time and lacking interest; dull.

Origin:

Late 16th century (in the sense "wearisome, fatiguing"): from latin taediosus, from taedium (see tedium).

Examples:

1. The lecture was tedious and I found myself struggling to stay awake.
2. The journey was tedious as it took 6 hours to reach our destination.
3. The paperwork was tedious and time-consuming.
4. She found the task tedious, but persevered.
5. He found the conversation tedious, but he was too polite to interrupt.