countless
adj. US //ˈkaʊntɫəs// UK //kˈaʊntləs// count·less
-
1 too many to count (adj.) B2 Upper Intermediatedescribing a very large number of things, people, or times.
innumerable or too many to be counted; often used for emphasis to describe a vast quantity.
ExampleI have told him countless times to lock the door when he leaves.
ExampleThe scientist spent countless hours in the laboratory, meticulously documenting every minor variation in the chemical reaction over several months.
From count + -less.