Which term refers to items that cannot be easily counted?

The term that refers to items that cannot be easily counted is "less." In English grammar, "less" is typically used with uncountable nouns, such as substances or concepts that cannot be quantified individually. For example, one would say "less water" or "less sugar" because these items do not have distinct, countable units.

In contrast, "fewer" is used with countable nouns, emphasizing a reduction in the number of discrete items, like "fewer apples" or "fewer people." "Many" and "several" also suggest bulk or quantity but typically apply to countable items and do not fit the definition of what cannot be easily counted. Therefore, "less" is the most appropriate choice when referring to items that are not straightforwardly quantifiable.