Word of the Day: Arduous
What I think it means: Well, I know this one, so it’s not going to be a shocking result. Arduous refers to difficult–strenuous would be a smashing synonym.
What it actually means: Demanding great effort or labor; difficult. I will say, this word is well worth putting in your arsenal, because arduous gets a lot of use. It’s not just a tough task, it’s an arduous one–the implication is more dramatic and therefore evokes more of a feeling.