tedious

US /ˈtiː.di.əs/
UK /ˈtiː.di.əs/
"tedious" picture
1.

too long, slow, or dull; tiresome or monotonous

:
•
The work was tedious and repetitive.
•
Learning a new language can be a tedious process.
:
boringdullmonotonoustiresomeuninteresting
:
excitinginterestingengagingstimulatingcaptivating