The word seems inadequate to describe how infinitesimally small we are, compared to the known universe.
Our Galaxy - the one we refer to as the Milky way - contains roughly 100 thousand million stars. Outside our own galaxy there are many more, some of them much bigger than our own, and containing far more stars. A good estimate puts the number of stars in the universe at around 50,000 billion billion.
Now you can feel incredibly, unbelievably insignificant.