Sentence:  The stock <WSD>dropped</WSD> 1.5% yesterday.   We can take our vacation when the price of fuel <WSD>drops</WSD>.   Watch for the temperature to <WSD>drop</WSD> sharply, then you'll know the reaction is complete. 
Meaning of the word marked with <WSD> tags:  To lessen, decrease, or diminish in value, condition, degree, etc. (from 18th c.)