IPA: /ʌnˈkaʊntəbl/
KK: /ʌnˈkaʊntəbl/
Referring to something that cannot be counted individually because it is seen as a whole or mass.
Water is an uncountable noun because you cannot say 'two waters'.
Uncountable → It is formed from "un-" (meaning not) and "countable" (from Latin "computare", meaning to calculate or count). The word "uncountable" means not able to be counted or quantified.
Think of 'not' ('un-') being added to 'countable', which means something that cannot be counted.