What is another word for waste of effort?
Pronunciation: [wˈe͡ɪst ɒv ˈɛfət] (IPA) 
When a task seems pointless or unproductive, it's often described as a "waste of effort." There are many synonyms that can be used to convey the same sentiment. One such term is "futile," which suggests that the effort is doomed to fail or produce little results. Another option is "unrewarding," which highlights the lack of benefit that will be gained from completing the task. Some may describe such an activity as "pointless" or "useless," emphasizing the lack of purpose or value. Additionally, you could use words like "fruitless" or "unproductive," both of which suggest that the effort is unlikely to produce any useful outcome.
