Use 'wearisome' to describe tasks or activities that are dull and tiring. Not for people directly. Compiling the report was a wearisome job.
Pro Tip 2/3
Extended Periods
'Wearisome' is best for situations that stretch over time and drain energy or enthusiasm. The wearisome process of scanning all the documents took hours.
Pro Tip 3/3
Emotional Tone
'Wearisome' can reflect a feeling of mental fatigue and frustration with the monotony. Reading the same instructions repeatedly became wearisome.