endeavor

An endeavor is an effort or attempt to do something, often with hard work and dedication. You can think of it as trying your best to achieve a goal.

When someone says they're undertaking a new project at work, they mean they're starting an endeavor - giving their full attention and energy to get the job done. People also use this word when talking about making progress towards a long-term goal, like training for a marathon or learning a new skill. For instance, "I've been working hard on my novel, it's a big endeavor, but I'm determined to finish it." In general, an endeavor is something you put your heart and mind into, with the hope of succeeding in the end.