Sentence:  This may just be pride in my adopted State of Washington , but certainly I love to visit their mound cities near Yakima and Prosser in July or August , when the bees are in their <WSD>most</WSD> active period . 
Meaning of the word marked with <WSD> tags:  the superlative of `much' that can be used with mass nouns and is usually preceded by `the'; a quantifier meaning the greatest in amount or extent or degree