difficult and tiring
arduous - difficult
Something ‘arduous’ is hard to accomplish and requires an enormous amount of energy and effort. The word implies the need for will power and perseverance over physical capability, so people able to complete such feats are typically very mentally strong and dedicated. Can be used in either a social or professional context.
It was an arduous journey to the top of the mountain, but I was absolutely determined to reach the summit.
We were taken aback by the arduousness of the task. It was much more difficult than any of us had imagined.
Rebecca has always wanted to run her own business and she’s arduously working to make that dream a reality.