Use 'onerous' to describe tasks that feel overwhelmingly heavy or difficult. Studying for the bar exam was an onerous undertaking.
Pro Tip 2/3
Emotional Weight
'Onerous' conveys not only difficulty but also a sense of burden that can affect one's emotions. The onerous nature of caregiving can lead to emotional exhaustion.
Pro Tip 3/3
Not Always Negative
While daunting, 'onerous' tasks can have a positive outcome or purpose. Despite the onerous work, the charity event was a great success.