This is the 4334th most frequent Japanese word.
労力
Effort or labor.
The word "労力" refers to the effort or amount of work required to accomplish a task.
このプロジェクトは多大な労力を必要とする。
This project requires a huge amount of effort.
Here, "労力" emphasizes the effort put into achieving something, implying a sense of persistence.
労力を惜しまず努力した結果、成功を掴むことができた。
By putting in effort without reservation, we were able to achieve success.
In this context, "労力" is used to contrast effort with convenience, questioning effortlessness.