countless

An endless number of things can be described with "countless." Think of all the stars in the sky or grains of sand on a beach.

When we talk about something having countless qualities, advantages, or characteristics, it means there are too many to count. For example, someone might say, "This city has countless museums and art galleries" – they're not trying to give an exact number, just expressing that there are so many. We also use "countless" when talking about things we can't measure or calculate, like the amount of sand on a beach or the number of people in a huge crowd. The idea is that these numbers are too big to even think about counting.