The antonyms for the word "un-countable" are countable, quantifiable, measurable, finite, and definite. Countable refers to objects that can be counted, whereas quantifiable and measurable signify the ability to measure something in terms of quantity or size. Finite means limited in quantity or extent, while definite implies that something is clearly defined or precise. The presence of these antonyms highlights the importance of being able to quantify things in our daily lives. In particular, countable and quantifiable are integral to scientific investigations, and finite and definite are vital in shaping our understanding of the world around us.