adjective
tedious
TEE-dee-us/ˈtiːdiəs/
Boring and tiring because it seems to go on too long.
Sorting the towering pile of identical forms is tedious work.

Etymology
The Latin idea of weariness became a description of things that cause it, such as a drawn-out task, journey, or speech.
In context
if any of you are tracking the climate change agreement, you know this can be a very slow, frustrating, tedious process.
More examples
- The meeting grows tedious as everyone repeats the same arguments.
- Removing old wallpaper is a tedious process.
- Her jokes make the long wait less tedious.
Forms
tedious · more tedious · most tedious
tediously adverb — In a boring and tiresomely prolonged way.
tediousness noun — The quality of being boringly long.
Similar words
- boring
- Emphasizes lack of interest, without necessarily suggesting excessive length.
- tiresome
- Emphasizes annoyance or fatigue, not necessarily a prolonged experience.
- monotonous
- Emphasizes repetition or lack of variety rather than excessive length.